A little boy is wearing a snorkel in a bathtub.
A boy is playing pretend.
A boy is wearing a snorkel in a bathtub doesn't imply that his playing pretend.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & in(x2,x3) & n_bathtub(x3) & n_snorkel(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_pretend(x2) & n_boy(x1))