Workers with white t-shirts measure a wooden board.
Two girls play hopscotch.
The subjects and actions of both sentences are completely different. Workers measure in example 1. Girls play in example 2.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_measure(e1) & n_board(x3) & a_wooden(s2) & Theme(s2,x3) & with(x1,x2) & n_t-shirt(x2) & a_white(s1) & Theme(s1,x2) & n_worker(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hopscotch(x2) & n_girl(x1) & card_eq_2(x1))