A musical street quartet performs with a guitar case set out for donations.
Men are playing some instruments outside.
The men could be performing without musical instruments by using only their voices.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(with(e1,x3) & for(e2,x6) & n_donation(x6) & a_out(s2) & Manner(e2,s2) & Theme(e2,x5) & v_set(e2) & (x3 = x5) & n_case(x3) & of(x3,x4) & n_guitar(x4) & Actor(e1,x1) & v_perform(e1) & n_quartet(x1) & of(x1,x2) & n_street(x2) & a_musical(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(a_outside(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & n_man(x1))