To find the density of a rock you need to find the mass of the rock with a balance, and find the volume of the rock.
(you; need; to find the mass of the rock with a balance, and find the volume of the rock) Context(you need,List([30, 38))):(you; need to find; the mass of the rock) Context(you need,List([30, 38))):(you; need to find; the volume of the rock)
you need,List([30, 38)) you need,List([30, 38))
you you you
need need to find need to find
to find the mass of the rock with a balance, and find the volume of the rock
the mass of the rock
the volume of the rock