the two boys playing guitar
Two kids are learning to play guitar.
the two boys playing guitar does not imply they are learning to play guitar.
exists e1 x1 x2 x3.(n_boy(x1) & card_eq_2(x1) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_learn(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & n_guitar(x2)) & n_kid(x1) & card_eq_2(x1))