--- title: The first accurate atomic clock was built in London in 1955; today a… — Pendulums, Greenwich and railway time, atomic cl… · tree and pragmatics description: The first accurate atomic clock was built in London in 1955; today a second is measured by counting over 9 billion tiny ticks of caesium atoms. A sentence of the lesson «Pendulums, Greenwich and railway time, atomic clocks and phones» of the world course of Mova's primary school with its dependency --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/world/123-pendulums-greenwich-atomic-clocks/22/) [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/) / [World](https://md.mova.elamur.ai/free/en/corpora/school/world/) / [Pendulums, Greenwich and railway time,…](https://md.mova.elamur.ai/free/en/corpora/school/world/123-pendulums-greenwich-atomic-clocks/) / 22 # Pendulums, Greenwich and railway time, atomic clocks and phones, sentence 22 The first accurate atomic clock was built in London in 1955; today a second is measured by counting over 9 billion tiny ticks of caesium atoms. **What happens:** build, measure, count, tick · **To what, where:** first accurate atomic clock, London, second, billion tiny ticks, caesium atoms This is a sentence of the lesson «Pendulums, Greenwich and railway time, atomic clocks and phones» 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: what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:world:123-pendulums-greenwich-atomic-clocks.lesson:22 # text = The first accurate atomic clock was built in London in 1955; today a second is measured by counting over 9 billion tiny ticks of caesium atoms. # source = school lesson (ours) # course = world # lesson = 123-pendulums-greenwich-atomic-clocks.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 ×2, R7-rel-agree ×2 1 The the DET DT Definite=Def|PronType=Art 5 det _ _ 2 first first ADJ JJ Degree=Pos|NumForm=Word|NumType=Ord 5 amod _ _ 3 accurate accurate ADJ JJ Degree=Pos 5 amod _ _ 4 atomic atomic ADJ JJ Degree=Pos 5 amod _ Agree=R7-rel-agree|Haiku=5:compound|HaikuPos=NOUN:NN:Number=Sing 5 clock clock NOUN NN Number=Sing 7 nsubj:pass _ _ 6 was be AUX VBD Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin 7 aux:pass _ _ 7 built build VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 0 root _ _ 8 in in ADP IN _ 9 case _ _ 9 London London PROPN NNP Number=Sing 7 obl _ _ 10 in in ADP IN _ 11 case _ _ 11 1955 1955 NUM CD NumForm=Digit|NumType=Card 7 obl _ _ 12 ; ; PUNCT : _ 11 punct _ _ 13 today today NOUN NN Number=Sing 17 obl:unmarked _ Agree=R5-strong|Haiku=7:obl:unmarked 14 a a DET DT Definite=Ind|PronType=Art 15 det _ _ 15 second second NOUN NN Number=Sing 17 nsubj:pass _ _ 16 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 17 aux:pass _ _ 17 measured measure VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 7 parataxis _ Agree=R7-rel-agree|Haiku=7:conj 18 by by SCONJ IN _ 19 mark _ _ 19 counting count VERB VBG Tense=Pres|VerbForm=Part 17 advcl _ _ 20 over over ADV RB _ 21 advmod _ _ 21 9 9 NUM CD NumForm=Digit|NumType=Card 22 compound _ Agree=R5-strong|Haiku=24:nummod 22 billion billion NUM CD NumForm=Word|NumType=Card 24 nummod _ _ 23 tiny tiny ADJ JJ Degree=Pos 24 amod _ _ 24 ticks tick NOUN NNS Number=Plur 19 obj _ _ 25 of of ADP IN _ 27 case _ _ 26 caesium caesium NOUN NN Number=Sing 27 compound _ _ 27 atoms atom NOUN NNS Number=Plur 24 nmod _ _ 28 . . PUNCT . _ 7 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 | **build** | past · passive | | the first accurate atomic clock | | London | | in 1955 | vn build-26.1-1 «NP.asset V NP»: subject=Product | | 2 | **measure** | present · passive | | a second | | | today | | vn register-54.1-2-1 «NP V NP.value»: subject=Value | | 3 | **count** | gerund | | billion tiny ticks of caesium atoms | | | | | vn multiply-108 «NP V NP»: agent=Agent tick=Theme | | 4 | **tick** | | | caesium atoms | | | | | nom tick «event 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:world:123-pendulums-greenwich-atomic-clocks.lesson:22`. **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 ×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: [Pendulums, Greenwich and railway time,…, 21](https://md.mova.elamur.ai/free/en/corpora/school/world/123-pendulums-greenwich-atomic-clocks/21/) - next →: [Pendulums, Greenwich and railway time,…, 23](https://md.mova.elamur.ai/free/en/corpora/school/world/123-pendulums-greenwich-atomic-clocks/23/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/world/123-pendulums-greenwich-atomic-clocks/)