--- title: Rubber is a natural polymer from the sap of rubber trees; its chains… — Plastics: useful and stubborn · tree and pragmatics description: Rubber is a natural polymer from the sap of rubber trees; its chains are joined by links that pull it back into shape after stretching. Who acts: Rubber, links. A sentence of the lesson «Plastics: useful and stubborn» of the chemistry course of Mova's primary school with its dependency tree and the --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/chemistry/29-plastics-useful-stubborn/12/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Chemistry](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/) / [Plastics: useful and stubborn](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/29-plastics-useful-stubborn/) / 12 # Plastics: useful and stubborn, sentence 12 Rubber is a natural polymer from the sap of rubber trees; its chains are joined by links that pull it back into shape after stretching. **Who acts:** Rubber, links · **What happens:** be, join, pull back, stretch · **To what, where:** natural polymer, sap, chains, chain, shape This is a sentence of the lesson «Plastics: useful and stubborn» of the chemistry 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 (Rubber, links), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:chemistry:029-plastics-useful-stubborn.lesson:12 # text = Rubber is a natural polymer from the sap of rubber trees; its chains are joined by links that pull it back into shape after stretching. # source = school lesson (ours) # course = chemistry # lesson = 029-plastics-useful-stubborn.lesson # annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×1, R7-rel-agree ×1 1 Rubber rubber NOUN NN Number=Sing 5 nsubj _ _ 2 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 5 cop _ _ 3 a a DET DT Definite=Ind|PronType=Art 5 det _ _ 4 natural natural ADJ JJ Degree=Pos 5 amod _ _ 5 polymer polymer NOUN NN Number=Sing 0 root _ _ 6 from from ADP IN _ 8 case _ _ 7 the the DET DT Definite=Def|PronType=Art 8 det _ _ 8 sap sap NOUN NN Number=Sing 5 nmod _ _ 9 of of ADP IN _ 11 case _ _ 10 rubber rubber NOUN NN Number=Sing 11 compound _ _ 11 trees tree NOUN NNS Number=Plur 8 nmod _ _ 12 ; ; PUNCT : _ 16 punct _ _ 13 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 14 nmod:poss _ _ 14 chains chain NOUN NNS Number=Plur 16 nsubj:pass _ _ 15 are be AUX VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 16 aux:pass _ _ 16 joined join VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 5 parataxis _ Agree=R7-rel-agree|Haiku=5:conj 17 by by ADP IN _ 18 case _ _ 18 links link NOUN NNS Number=Plur 16 obl _ _ 19 that that PRON WDT PronType=Rel 20 nsubj _ _ 20 pull pull VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 18 acl:relcl _ _ 21 it it PRON PRP Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs 20 obj _ _ 22 back back ADV RB _ 20 advmod _ _ 23 into into ADP IN _ 24 case _ _ 24 shape shape NOUN NN Number=Sing 20 obl _ Agree=R5-strong|Haiku=22:obl 25 after after SCONJ IN _ 26 mark _ _ 26 stretching stretch VERB VBG Tense=Pres|VerbForm=Part 20 advcl _ _ 27 . . PUNCT . _ 5 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is a** | present | Rubber | a natural polymer | | the sap of rubber trees | | | tree rules | | 2 | **join** | present · passive | links | rubber's chains | | | | | vn mix-22.1-2-1 «NP V NP»: agent=Agent subject=Patient | | 3 | **pull back** | present | links | chain | | shape | | | vn push-12-1 «NP V NP»: agent=Agent it=Theme | | 4 | **stretch** | gerund | links *not said here* | | | | | | vn bend-45.2 «NP.patient V»: agent=Patient | 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. **Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:chemistry:029-plastics-useful-stubborn.lesson:12`. **The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×1, R7-rel-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence. See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/). - ← previous: [Plastics: useful and stubborn, 10](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/29-plastics-useful-stubborn/10/) - next →: [Plastics: useful and stubborn, 13](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/29-plastics-useful-stubborn/13/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/29-plastics-useful-stubborn/)