Clever reasoning about water and matter, sentence 4

Salt is spread on icy roads because salty water freezes at a lower temperature than pure water; the salt dissolves in the thin wet layer on the ice and makes it melt even a few degrees below 0 °C.

Who acts: salty water, salt, water · What happens: spread, freeze, dissolve, make, melt · To what, where: Salt, icy roads, lower temperature, thin wet layer, water, few degrees

This is a sentence of the lesson «Clever reasoning about water and matter» of the world course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (salty water, salt, water), what happens, when and where, as Mova's frames read it from the tree.

The tree

Pragmatics

form

statement

act

assert

voice

narrator

polarity

none

teacher

kept the draft

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.

This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/world/20-reasoning-water-and-matter/4/