In a science class, he watched students assemble models of molecules with marshmallows.
(he; watched; students assemble models of molecules with marshmallows; L:In a science class) Context(he watched,List([20, 30))):(students; assemble; models of molecules with marshmallows)
he watched,List([20, 30))
he students
watched assemble
students assemble models of molecules with marshmallows L:In a science class
models of molecules with marshmallows