Exam question 3 · Mirrors, rainbows and the blue sky
It is given that an observer perceives a rainbow. Determine the position of the Sun relative to the observer.
Mova's choice: option 1 · The right answer: option 4 · wrong ✗ · Who acts: observer, you · What happens: give, perceive, determine · To what, where: It, rainbow, position
This is exam question 3 of lesson 21 «Mirrors, rainbows and the blue sky» of the physics course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: the test at school.
The question
Sentence 1: It is given that an observer perceives a rainbow.
The words, one row each (CoNLL-U)
| # | word | lemma | UPOS | features | head | relation |
|---|---|---|---|---|---|---|
| 1 | It | it | PRON | Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs | 3 given | nsubj:pass |
| 2 | is | be | AUX | Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin | 3 given | aux:pass |
| 3 | given | give | VERB | Tense=Past VerbForm=Part Voice=Pass | root | root |
| 4 | that | that | SCONJ | _ | 7 perceives | mark |
| 5 | an | a | DET | Definite=Ind PronType=Art | 6 observer | det |
| 6 | observer | observer | NOUN | Number=Sing | 7 perceives | nsubj |
| 7 | perceives | perceive | VERB | Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin | 3 given | advcl |
| 8 | a | a | DET | Definite=Ind PronType=Art | 9 rainbow | det |
| 9 | rainbow | rainbow | NOUN | Number=Sing | 7 perceives | obj |
| 10 | . | . | PUNCT | _ | 3 given | punct |
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
|---|---|---|---|---|---|---|---|---|---|
| 1 | give | present · passive | It | vn give-13.1-1 «NP V NP»: subject=Theme | |||||
| 2 | perceive | present | a observer | a rainbow | vn see-30.1-1 «NP V S»: agent=Experiencer rainbow=Stimulus |
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.
Sentence 2: Determine the position of the Sun relative to the observer.
The words, one row each (CoNLL-U)
| # | word | lemma | UPOS | features | head | relation |
|---|---|---|---|---|---|---|
| 1 | Determine | determine | VERB | Mood=Imp VerbForm=Fin | root | root |
| 2 | the | the | DET | Definite=Def PronType=Art | 3 position | det |
| 3 | position | position | NOUN | Number=Sing | 1 Determine | obj |
| 4 | of | of | ADP | _ | 7 relative | case |
| 5 | the | the | DET | Definite=Def PronType=Art | 7 relative | det |
| 6 | Sun | Sun | PROPN | Number=Sing | 7 relative | compound |
| 7 | relative | relative | NOUN | Number=Sing | 3 position | nmod |
| 8 | to | to | ADP | _ | 10 observer | case |
| 9 | the | the | DET | Definite=Def PronType=Art | 10 observer | det |
| 10 | observer | observer | NOUN | Number=Sing | 7 relative | nmod |
| 11 | . | . | PUNCT | _ | 1 Determine | punct |
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
|---|---|---|---|---|---|---|---|---|---|
| 1 | determine | imperative | you not said here | the position of the Sun relative to the observer | vn discover-84 «NP V NP»: agent=Agent position=Topic |
The options
Option 1 · ← Mova's choice
Directly before the observer
The words, one row each (CoNLL-U)
| # | word | lemma | UPOS | features | head | relation |
|---|---|---|---|---|---|---|
| 1 | Directly | directly | ADV | _ | root | root |
| 2 | before | before | ADP | _ | 4 observer | case |
| 3 | the | the | DET | Definite=Def PronType=Art | 4 observer | det |
| 4 | observer | observer | NOUN | Number=Sing | 1 Directly | obl |
The frames reader finds no event or fact in this sentence.
Option 2
Below the horizon in front of the observer
The words, one row each (CoNLL-U)
| # | word | lemma | UPOS | features | head | relation |
|---|---|---|---|---|---|---|
| 1 | Below | below | ADP | _ | 3 horizon | case |
| 2 | the | the | DET | Definite=Def PronType=Art | 3 horizon | det |
| 3 | horizon | horizon | NOUN | Number=Sing | root | root |
| 4 | in | in | ADP | _ | 5 front | case |
| 5 | front | front | NOUN | Number=Sing | 3 horizon | nmod |
| 6 | of | of | ADP | _ | 8 observer | case |
| 7 | the | the | DET | Definite=Def PronType=Art | 8 observer | det |
| 8 | observer | observer | NOUN | Number=Sing | 5 front | nmod |
The frames reader finds no event or fact in this sentence.
Option 3
Directly overhead
The words, one row each (CoNLL-U)
| # | word | lemma | UPOS | features | head | relation |
|---|---|---|---|---|---|---|
| 1 | Directly | directly | ADV | _ | 2 overhead | advmod |
| 2 | overhead | overhead | NOUN | Number=Sing | root | root |
The frames reader finds no event or fact in this sentence.
Option 4 · ✓ the right answer
Behind the observer
The words, one row each (CoNLL-U)
| # | word | lemma | UPOS | features | head | relation |
|---|---|---|---|---|---|---|
| 1 | Behind | behind | ADP | _ | 3 observer | case |
| 2 | the | the | DET | Definite=Def PronType=Art | 3 observer | det |
| 3 | observer | observer | NOUN | Number=Sing | root | root |
The frames reader finds no event or fact in this sentence.
Text: the tests of Mova's primary school, written for Mova (world/data/school/), as the course runner gave them to the student. Trees: Mova's own parse — the en model on the CPU, when the site is built — not checked by a teacher; they may be wrong. Frames: Mova's frames reader (prag), each text read on its own. Elamur Cosmic License.
This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/questions/physics/21-mirrors-rainbows-and-the-blue-sky/e3/