Several men are working on tiles together while sitting on the floor.
boy plays sega
Being men and a boy are two different places on a human's timeline and cannot exist at the same time.
exists e1 e2 s1 s2 x1 x2 x3.(n_floor(x3) & while(e1,e2) & on(e2,x3) & Actor(e2,x1) & v_sit(e2) & a_together(s2) & Manner(e1,s2) & on(e1,x2) & n_tile(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1) & a_several(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_sega(x2) & n_boy(x1))