--- title: Ball bearings are tiny steel balls that roll between a wheel and its… — Living with friction: oil, wheels and grip · tree and pragmatics description: Ball bearings are tiny steel balls that roll between a wheel and its axle, and they are in skateboards, bikes, fans and washing machines. Who acts: Ball bearings, tiny steel balls, bearings. A sentence of the lesson «Living with friction: oil, wheels and grip» of the physics course of Mova's primary --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/physics/7-living-with-friction/7/) [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/) / [Physics](https://md.mova.elamur.ai/free/en/corpora/school/physics/) / [Living with friction: oil, wheels and…](https://md.mova.elamur.ai/free/en/corpora/school/physics/7-living-with-friction/) / 7 # Living with friction: oil, wheels and grip, sentence 7 Ball bearings are tiny steel balls that roll between a wheel and its axle, and they are in skateboards, bikes, fans and washing machines. **Who acts:** Ball bearings, tiny steel balls, bearings · **What happens:** be, roll · **To what, where:** tiny steel balls, wheel, skateboards This is a sentence of the lesson «Living with friction: oil, wheels and grip» of the physics 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 (Ball bearings, tiny steel balls, bearings), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:physics:007-living-with-friction.lesson:7 # text = Ball bearings are tiny steel balls that roll between a wheel and its axle, and they are in skateboards, bikes, fans and washing machines. # source = school lesson (ours) # course = physics # lesson = 007-living-with-friction.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): R7-rel-agree ×2 1 Ball ball NOUN NN Number=Sing 2 compound _ _ 2 bearings bearing NOUN NNS Number=Plur 6 nsubj _ _ 3 are be AUX VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 6 cop _ _ 4 tiny tiny ADJ JJ Degree=Pos 6 amod _ _ 5 steel steel NOUN NN Number=Sing 6 compound _ _ 6 balls ball NOUN NNS Number=Plur 0 root _ _ 7 that that PRON WDT PronType=Rel 8 nsubj _ _ 8 roll roll VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 6 acl:relcl _ _ 9 between between ADP IN _ 11 case _ _ 10 a a DET DT Definite=Ind|PronType=Art 11 det _ _ 11 wheel wheel NOUN NN Number=Sing 8 obl _ Agree=R7-rel-agree|Haiku=8:nmod 12 and and CCONJ CC _ 14 cc _ _ 13 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 14 nmod:poss _ _ 14 axle axle NOUN NN Number=Sing 11 conj _ _ 15 , , PUNCT , _ 20 punct _ _ 16 and and CCONJ CC _ 20 cc _ _ 17 they they PRON PRP Case=Nom|Number=Plur|Person=3|PronType=Prs 20 nsubj _ _ 18 are be AUX VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 20 cop _ _ 19 in in ADP IN _ 20 case _ _ 20 skateboards skateboard NOUN NNS Number=Plur 6 conj _ _ 21 , , PUNCT , _ 22 punct _ _ 22 bikes bike NOUN NNS Number=Plur 20 conj _ _ 23 , , PUNCT , _ 24 punct _ _ 24 fans fan NOUN NNS Number=Plur 20 conj _ _ 25 and and CCONJ CC _ 27 cc _ _ 26 washing washing NOUN NN Number=Sing 27 compound _ Agree=R7-rel-agree|Haiku=27:amod|HaikuPos=VERB:VBG:VerbForm=Ger 27 machines machine NOUN NNS Number=Plur 20 conj _ _ 28 . . PUNCT . _ 6 punct _ _ ``` ## Pragmatics {#pragmatics} - form: statement - act: assert - voice: narrator - polarity: none - teacher: kept the draft | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is a** | present | Ball bearings | tiny steel balls and skateboards and bikes and fans and washing machines | | | | | tree rules | | 2 | **roll** | present | tiny steel balls and skateboards and bikes and fans and washing machines | | | a wheel and oil's axle | | | vn run-51.3.2-2 «NP V PP.location»: agent=Theme between wheel=Trajectory | | 3 | **is** | present | bearings *= bearing* | | | skateboards and bikes and fans and washing machines | | | tree rules | 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:physics:007-living-with-friction.lesson:7`. **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): 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: [Living with friction: oil, wheels and…, 6](https://md.mova.elamur.ai/free/en/corpora/school/physics/7-living-with-friction/6/) - next →: [Living with friction: oil, wheels and…, 8](https://md.mova.elamur.ai/free/en/corpora/school/physics/7-living-with-friction/8/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/physics/7-living-with-friction/)