Children playing checkers.
kids play together
Kids playing checkers means that they play together.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_checkers(x3) & (x1 = x2) & n_child(x1))
exists e1 s1 x1.(a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1) & n_kid(x1))