--- title: Lidar is a spinning laser that measures the distance to everything b… — Self-driving cars and machines that run themselves · tree and pragmatics description: Lidar is a spinning laser that measures the distance to everything by timing how long its light takes to come back, and it can build a 3D picture of a street. Who acts: Lidar, spinning laser, light. A sentence of the lesson «Self-driving cars and machines that run themselves» of the technology cours --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/technology/40-self-driving-cars-and-machines-that-run-themselves/13/) [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/) / [Technology](https://md.mova.elamur.ai/free/en/corpora/school/technology/) / [Self-driving cars and machines that ru…](https://md.mova.elamur.ai/free/en/corpora/school/technology/40-self-driving-cars-and-machines-that-run-themselves/) / 13 # Self-driving cars and machines that run themselves, sentence 13 Lidar is a spinning laser that measures the distance to everything by timing how long its light takes to come back, and it can build a 3D picture of a street. **Who acts:** Lidar, spinning laser, light · **What happens:** spin, be, measure, time, take, come back · **To what, where:** spinning laser, distance, 3D picture This is a sentence of the lesson «Self-driving cars and machines that run themselves» of the technology 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 (Lidar, spinning laser, light), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:technology:040-self-driving-cars-and-machines-that-run-themselves.lesson:13 # text = Lidar is a spinning laser that measures the distance to everything by timing how long its light takes to come back, and it can build a 3D picture of a street. # source = school lesson (ours) # course = technology # lesson = 040-self-driving-cars-and-machines-that-run-themselves.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): no change 1 Lidar lidar 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 spinning spin VERB VBG VerbForm=Ger 5 amod _ _ 5 laser laser NOUN NN Number=Sing 0 root _ _ 6 that that PRON WDT PronType=Rel 7 nsubj _ _ 7 measures measure VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 5 acl:relcl _ _ 8 the the DET DT Definite=Def|PronType=Art 9 det _ _ 9 distance distance NOUN NN Number=Sing 7 obj _ _ 10 to to ADP IN _ 11 case _ _ 11 everything everything PRON NN Number=Sing|PronType=Tot 9 nmod _ _ 12 by by SCONJ IN _ 13 mark _ _ 13 timing time VERB VBG Tense=Pres|VerbForm=Part 7 advcl _ _ 14 how how ADV WRB PronType=Int 15 advmod _ _ 15 long long ADV RB Degree=Pos 18 advmod _ _ 16 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 17 nmod:poss _ _ 17 light light NOUN NN Number=Sing 18 nsubj _ _ 18 takes take VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 13 ccomp _ _ 19 to to PART TO _ 20 mark _ _ 20 come come VERB VB VerbForm=Inf 18 advcl _ _ 21 back back ADV RB _ 20 advmod _ _ 22 , , PUNCT , _ 26 punct _ _ 23 and and CCONJ CC _ 26 cc _ _ 24 it it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 26 nsubj _ _ 25 can can AUX MD VerbForm=Fin 26 aux _ _ 26 build build VERB VB VerbForm=Inf 13 conj _ _ 27 a a DET DT Definite=Ind|PronType=Art 29 det _ _ 28 3D 3d ADJ JJ Degree=Pos|NumForm=Combi 29 amod _ _ 29 picture picture NOUN NN Number=Sing 26 obj _ _ 30 of of ADP IN _ 32 case _ _ 31 a a DET DT Definite=Ind|PronType=Art 32 det _ _ 32 street street NOUN NN Number=Sing 29 nmod _ _ 33 . . PUNCT . _ 5 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 | **spin** | gerund | | | | | | | vn roll-51.3.1 «NP.theme V»: agent=Theme | | 2 | **is a** | present | Lidar | a spinning laser | | | | | tree rules | | 3 | **measure** | present | a spinning laser | the distance | | | | to everything | vn register-54.1-2-1 «NP V NP.value»: agent=Theme distance=Value | | 4 | **time** | gerund | a spinning laser *not said here* | | | | | | tree rules | | 5 | **take** | present | lidar's light | | | | | long *property* | vn bring-11.3 «NP V NP»: agent=Agent | | 6 | **come back** | to-infinitive | lidar's light *not said here* | | | | | | vn escape-51.1-1 «NP V»: agent=Theme | | 7 | **build** | can | light | a 3D picture of a street | | | | | vn build-26.1-1 «NP.material V NP»: agent=Material picture=Product | | 8 | **light** | | lidar | | | | | | nom light «phenomenon transitive»: poss=agent | 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:technology:040-self-driving-cars-and-machines-that-run-themselves.lesson:13`. **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): no change. **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: [Self-driving cars and machines that ru…, 12](https://md.mova.elamur.ai/free/en/corpora/school/technology/40-self-driving-cars-and-machines-that-run-themselves/12/) - next →: [Self-driving cars and machines that ru…, 14](https://md.mova.elamur.ai/free/en/corpora/school/technology/40-self-driving-cars-and-machines-that-run-themselves/14/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/technology/40-self-driving-cars-and-machines-that-run-themselves/)