The girls were in the crowd.
There are girls in the crowd.
Both describe girls being in a crowd.
exists p1 x1 x2.(n_crowd(x2) & n_girl(x1) & in(x1,x2))
exists p1 x1 x2.(n_crowd(x2) & in(p1,x2) & exists x3.((x1 = x3) & n_girl(x3)))