Two men dressed in yellow uniforms are using a jackhammer in the ground.
The men are eating they're lunch.
They cannot be eating their lunch at the same time that they are actively using a jackhammer in the ground.
exists e1 e2 s1 x1 x2 x3 x4 x5.(n_ground(x5) & in(e2,x5) & Theme(e2,x4) & Actor(e2,x1) & v_use(e2) & n_jackhammer(x4) & in(e1,x3) & n_uniform(x3) & a_yellow(s1) & Theme(s1,x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 p1 x1.(n_thing(x1) & n_man(x1) & exists p2 x2.((x1 = x2) & n_lunch(x2)) & Topic(e1,p1) & Actor(e1,x1) & v_eat(e1))