--- title: For most of its life a star is a tug of war held in balance: gravity… — How stars live · tree and pragmatics description: For most of its life a star is a tug of war held in balance: gravity pulls everything inwards, and the pressure of hot gas pushes outwards, like a balloon whose rubber squeezes in while the air pushes out. Who acts: star, gravity, pressure, rubber. A sentence of the lesson «How stars live» of the sp --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/space/18-how-stars-live/1/) [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/) / [Space](https://md.mova.elamur.ai/free/en/corpora/school/space/) / [How stars live](https://md.mova.elamur.ai/free/en/corpora/school/space/18-how-stars-live/) / 1 # How stars live, sentence 1 For most of its life a star is a tug of war held in balance: gravity pulls everything inwards, and the pressure of hot gas pushes outwards, like a balloon whose rubber squeezes in while the air pushes out. **Who acts:** star, gravity, pressure, rubber, air · **What happens:** be, hold, pull, push, squeeze in, push out · **To what, where:** tug, war, balance, everything, hot gas This is a sentence of the lesson «How stars live» of the space 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 (star, gravity, pressure, rubber), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:space:018-how-stars-live.lesson:1 # text = For most of its life a star is a tug of war held in balance: gravity pulls everything inwards, and the pressure of hot gas pushes outwards, like a balloon whose rubber squeezes in while the air pushes out. # source = school lesson (ours) # course = space # lesson = 018-how-stars-live.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): R2-punct-next ×1, R5-strong ×2, R7-rel-agree ×2 1 For for ADP IN _ 2 case _ _ 2 most most ADJ JJS Degree=Sup 10 obl _ _ 3 of of ADP IN _ 5 case _ _ 4 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 5 nmod:poss _ _ 5 life life NOUN NN Number=Sing 2 nmod _ _ 6 a a DET DT Definite=Ind|PronType=Art 7 det _ _ 7 star star NOUN NN Number=Sing 10 nsubj _ _ 8 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 10 cop _ _ 9 a a DET DT Definite=Ind|PronType=Art 10 det _ _ 10 tug tug NOUN NN Number=Sing 0 root _ _ 11 of of ADP IN _ 12 case _ _ 12 war war NOUN NN Number=Sing 10 nmod _ _ 13 held hold VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 12 acl _ _ 14 in in ADP IN _ 15 case _ _ 15 balance balance NOUN NN Number=Sing 13 obl _ _ 16 : : PUNCT : _ 10 punct _ _ 17 gravity gravity NOUN NN Number=Sing 18 nsubj _ _ 18 pulls pull VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 10 parataxis _ _ 19 everything everything PRON NN Number=Sing|PronType=Tot 18 obj _ _ 20 inwards inwards ADV RB _ 18 advmod _ _ 21 , , PUNCT , _ 28 punct _ Agree=R2-punct-next|Haiku=18:punct 22 and and CCONJ CC _ 28 cc _ _ 23 the the DET DT Definite=Def|PronType=Art 24 det _ _ 24 pressure pressure NOUN NN Number=Sing 28 nsubj _ _ 25 of of ADP IN _ 27 case _ _ 26 hot hot ADJ JJ Degree=Pos 27 amod _ _ 27 gas gas NOUN NN Number=Sing 24 nmod _ _ 28 pushes push VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 18 conj _ _ 29 outwards outward ADV RB _ 28 advmod _ _ 30 , , PUNCT , _ 33 punct _ _ 31 like like ADP IN _ 33 case _ _ 32 a a DET DT Definite=Ind|PronType=Art 33 det _ _ 33 balloon balloon NOUN NN Number=Sing 28 obl _ _ 34 whose whose PRON WP$ Poss=Yes|PronType=Rel 35 nmod:poss _ Agree=R5-strong|Haiku=36:nmod:poss 35 rubber rubber NOUN NN Number=Sing 36 nsubj _ Agree=R7-rel-agree|Haiku=36:compound 36 squeezes squeeze VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 33 acl:relcl _ _ 37 in in ADV RB _ 36 advmod _ _ 38 while while SCONJ IN _ 41 mark _ _ 39 the the DET DT Definite=Def|PronType=Art 40 det _ Agree=R5-strong|Haiku=41:det 40 air air NOUN NN Number=Sing 41 nsubj _ _ 41 pushes push VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 36 advcl _ _ 42 out out ADP RP _ 41 compound:prt _ Agree=R7-rel-agree|Haiku=41:advmod|HaikuPos=ADV:RB:_ 43 . . PUNCT . _ 10 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 | a star | a tug | | | | for most of clump's life; of war | tree rules | | 2 | **hold** | participle | | war *not said here* | | balance | | | vn exist-47.1 «NP V PP.location»: agent=Theme in balance=Location | | 3 | **pull** | present | gravity | everything | | | | inwards *property* | vn push-12-1 «NP V NP»: agent=Agent everything=Theme | | 4 | **push** | present | the pressure of hot gas | | | | | like a balloon; outward *property* | vn push-12-1-1 «NP V PP»: agent=Agent | | 5 | **squeeze in** | present | rubber | | | | | | vn push-12-1-1 «NP V PP»: agent=Agent | | 6 | **push out** | present | the air | | | | | | vn push-12-1-1 «NP V PP»: agent=Agent | | 7 | **press** | | | hot gas | | | | | nom pressure «phenomenon transitive»: of=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:space:018-how-stars-live.lesson:1`. **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): R2-punct-next ×1, R5-strong ×2, R7-rel-agree ×2. **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: [How stars live, 0](https://md.mova.elamur.ai/free/en/corpora/school/space/18-how-stars-live/0/) - next →: [How stars live, 2](https://md.mova.elamur.ai/free/en/corpora/school/space/18-how-stars-live/2/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/space/18-how-stars-live/)