The man is talking into the microphone while playing the guitar.
The man holding the guitar shouts into a megaphone.
A megaphone and a microphone are two different things.
exists e1 e2 x1 x2 x3.(n_guitar(x3) & n_microphone(x2) & n_man(x1) & while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_play(e2) & into(e1,x2) & Actor(e1,x1) & v_talk(e1))
exists e1 e2 x1 x2 x3 x4.(n_guitar(x3) & n_man(x1) & into(e2,x4) & n_megaphone(x4) & Actor(e2,x1) & v_shout(e2) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & (x1 = x2))