A band is standing in front of a group of people playing there guitars and singing.
There are musicians playing for a crowd.
Crowd is another way to say group of people. If it is a band playing guitars, they are musicians.
exists e1 e3 e4 e2 x1 x2 x3 x4 x5 x6 x7 x8.(Actor(e4,x8) & v_sing(e4) & n_band(x8) & in(e1,x2) & of(x2,x3) & of(x3,x4) & Theme(e3,x7) & Actor(e3,x6) & v_guitar(e3) & (x4 = x7) & Actor(e2,x5) & v_play(e2) & (x4 = x5) & n_people(x4) & n_group(x3) & n_front(x2) & Actor(e1,x1) & v_stand(e1) & n_band(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & for(e1,x4) & n_crowd(x4) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_musician(x2))