A man playing the guitar is jumping.
The man rows the boat down the river.
You cannot be rowing a boat and jumping simultaneously.
exists e1 e2 x1 x2 x3.(n_guitar(x3) & Actor(e2,x1) & v_jump(e2) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_man(x1))
exists x1 x2 x3 x4.(n_river(x4) & n_row(x1) & of(x1,x2) & n_man(x2) & a_topic(x1) & down(x1,x4) & n_boat(x3) & (x1 = x3))