A group of people jump into a lake in unison.
The people are jumping
This statement is entirely true. The people are jumping.
exists e1 x1 x2 x3 x4.(in(e1,x4) & n_unison(x4) & into(e1,x3) & n_lake(x3) & Actor(e1,x1) & v_jump(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_jump(e1))