Two men play guitars amidst musical equipment.
two man were playing guitars in a band
Just because two men are playing guitars, doesn't imply that they are in a band.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_equipment(x2) & a_musical(s2) & Theme(s2,x2) & a_amidst(s1) & Theme(s1,x2) & of(x2,x3) & n_guitar(x3) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(in(e1,x3) & n_band(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1) & card_eq_2(x1))