--- title: Barter only works when each person has what the other wants; this is… — Swaps and barter in the playground · tree and pragmatics description: Barter only works when each person has what the other wants; this is called a double coincidence of wants. Who acts: Barter, person, other. A sentence of the lesson «Swaps and barter in the playground» of the money course of Mova's primary school with its dependency tree and the pragmatics of every --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/money/4-swaps-and-barter-in-the-playground/5/) [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/) / [Money](https://md.mova.elamur.ai/free/en/corpora/school/money/) / [Swaps and barter in the playground](https://md.mova.elamur.ai/free/en/corpora/school/money/4-swaps-and-barter-in-the-playground/) / 5 # Swaps and barter in the playground, sentence 5 Barter only works when each person has what the other wants; this is called a double coincidence of wants. **Who acts:** Barter, person, other · **What happens:** work, have, want, call · **To what, where:** this · **Speech:** someone speaks here This is a sentence of the lesson «Swaps and barter in the playground» of the money 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 (Barter, person, other), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:money:004-swaps-and-barter-in-the-playground.lesson:5 # text = Barter only works when each person has what the other wants; this is called a double coincidence of wants. # source = school lesson (ours) # course = money # lesson = 004-swaps-and-barter-in-the-playground.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, R8-pos-agree ×1 1 Barter Barter PROPN NNP Number=Sing 3 nsubj _ Agree=R8-pos-agree|Haiku=3:nsubj|HaikuPos=NOUN:NN:Number=Sing 2 only only ADV RB _ 3 advmod _ _ 3 works work VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 4 when when ADV WRB PronType=Int 7 advmod _ _ 5 each each DET DT PronType=Tot 6 det _ _ 6 person person NOUN NN Number=Sing 7 nsubj _ _ 7 has have VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 3 advcl _ _ 8 what what PRON WP PronType=Int 7 obj _ _ 9 the the DET DT Definite=Def|PronType=Art 10 det _ _ 10 other other ADJ JJ Degree=Pos 11 nsubj _ _ 11 wants want VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 8 acl:relcl _ _ 12 ; ; PUNCT , _ 15 punct _ _ 13 this this PRON DT Number=Sing|PronType=Dem 15 nsubj:pass _ _ 14 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 15 aux:pass _ _ 15 called call VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 3 parataxis _ Agree=R7-rel-agree|Haiku=3:conj 16 a a DET DT Definite=Ind|PronType=Art 18 det _ _ 17 double double ADJ JJ Degree=Pos 18 amod _ _ 18 coincidence coincidence NOUN NN Number=Sing 15 xcomp _ Agree=R7-rel-agree|Haiku=15:obj 19 of of ADP IN _ 20 case _ _ 20 wants want NOUN NNS Number=Plur 18 nmod _ _ 21 . . PUNCT . _ 3 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 | **work** | present | Barter | | | | | | vn employment-95.3 «NP V»: agent=Agent | | 2 | **have** | present | each person | | | | | | vn birth-28.2-1 «NP V NP»: agent=Agent what=Patient | | 3 | **want** | present | the other | | | | | | vn want-32.1-1-1 «NP V NP S\_INF»: agent=Pivot | | 4 | **call** | present · passive | | this | | | | | vn initiate\_communication-37.4.2-1 «NP V NP.recipient»: subject=Recipient | 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:money:004-swaps-and-barter-in-the-playground.lesson:5`. **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, R8-pos-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: [Swaps and barter in the playground, 4](https://md.mova.elamur.ai/free/en/corpora/school/money/4-swaps-and-barter-in-the-playground/4/) - next →: [Swaps and barter in the playground, 6](https://md.mova.elamur.ai/free/en/corpora/school/money/4-swaps-and-barter-in-the-playground/6/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/money/4-swaps-and-barter-in-the-playground/)