The students worked in groups, and used a balance to find the mass and density of different objects.
(The students; worked; L:in groups) (The students; used; a balance; to find the mass and density of different objects) Context(The students used,List([0, 39))):(The students; used a balance to find; the mass and density of different objects)
The students used,List([0, 39))
The students The students The students
worked used used a balance to find
L:in groups
a balance to find the mass and density of different objects
the mass and density of different objects