A male performer is playing a cello.
A guy is sitting with a musical instrument.
A guy is a male, and he is playing a cello.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_cello(x2) & n_performer(x1) & a_male(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(with(e1,x2) & n_instrument(x2) & a_musical(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_guy(x1))