Three men perform with guitars on stage while one sings.
The men are very quiet
if the men are singing and playing a guitar it can't be very quiet
exists e1 x1 x2 x3 x4.(while(e1,x4) & n_sing(x4) & card_eq_1(x4) & on(e1,x3) & n_stage(x3) & with(e1,x2) & n_guitar(x2) & Actor(e1,x1) & v_perform(e1) & n_man(x1) & card_eq_3(x1))
exists s1 x1.(n_man(x1) & r_very(s1) & Theme(s1,x1) & a_quiet(s1))