A group of musicians performing in the street.
The musicians are playing in the street.
Musicians performing in the street and musicians playing in the street mean the same thing.
exists e1 x1 x2 x3 x4.(n_street(x4) & a_topic(x1) & in(e1,x4) & Actor(e1,x3) & v_perform(e1) & (x1 = x3) & of(x1,x2) & n_musician(x2) & n_group(x1))
exists e1 x1 x2.(n_street(x2) & n_musician(x1) & in(e1,x2) & Actor(e1,x1) & v_play(e1))