A male musician dressed in white is playing a guitar.
Other musicians are providing backup music for the guitarist.
A man playing a guitar does not imply that backup music is being provided.
exists e1 e2 s1 x1 x2 x3 x4 x5.(Theme(e2,x5) & Actor(e2,x1) & v_play(e2) & n_guitar(x5) & Theme(e1,s1) & Theme(s1,x4) & a_white(s1) & Theme(e1,x3) & v_dress(e1) & (x1 = x3) & n_musician(x1) & of(x1,x2) & n_male(x2))
exists e1 s1 x1 x2 x3 x4.(n_guitarist(x4) & n_musician(x2) & for(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_provide(e1) & n_music(x3) & a_backup(s1) & Theme(s1,x3) & -(x1 = x2) & n_musician(x1))