Three students are listening to their teacher.
Three students are listening to their teacher explain evolution.
Just because students are listening to their teacher it does not mean the teacher explain evolution.
exists e1 x1 x2.(to(e1,x2) & n_teacher(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_listen(e1) & n_student(x1) & card_eq_3(x1))
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_explain(e2) & n_evolution(x4) & to(e1,x3) & n_teacher(x3) & of(x3,x1) & n_thing(x1) & Actor(e1,x2) & v_listen(e1) & (x1 = x2) & n_student(x1) & card_eq_3(x1))