Two men in bright yellow suits and wearing hearing protection are operating a yellow and black machine.
Two men are operating a machine.
The second sentence is a shorter version of the first second. Both tell us that men are operating a machine.
exists e2 e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(Theme(e2,x6) & Actor(e2,x1) & v_operate(e2) & n_machine(x8) & a_black(s3) & Theme(s3,x8) & n_yellow(x7) & subset_of(x8,x6) & subset_of(x7,x6) & in(x1,x2) & n_protection(x4) & of(x4,x5) & n_hearing(x5) & Actor(e1,x4) & v_wear(e1) & n_suit(x3) & subset_of(x4,x2) & subset_of(x3,x2) & a_yellow(s2) & Theme(s2,x2) & a_bright(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & n_machine(x2) & n_man(x1) & card_eq_2(x1))