Assertion: light | /r/HasProperty | needed
Facets:
value: to know finish
type: PURPOSE
value: to know the start
type: PURPOSE
value: along with water and carbon dioxide
type: OTHER
Source sentences:
text: The light generated from the sun or from other sources is needed, along with water and carbon dioxide, to produce sugars for the plant to use as energy.
text: To measure the time that the light has taken to travel from one place to another it is necessary to know the start and finish times as measured on the same time scale.