The boy in the swimming trunks is playing in the yard.
The boy is reading a bedtime story.
One does not read  a bed time story while playing in the yard.
exists e1 x1 x2 x3 x4.(n_yard(x4) & n_trunk(x2) & of(x2,x3) & n_swimming(x3) & n_boy(x1) & in(e1,x4) & Actor(e1,x1) & v_play(e1) & in(x1,x2))
exists e1 x1 x2 x3.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_story(x2) & of(x2,x3) & n_bedtime(x3))