A group of men are sitting down on the ground together.
Men are sitting
' A group of men are sitting down ' is  a rephrasing of ' Men are sitting '.
exists e1 s1 s2 x1 x2 x3.(n_ground(x3) & a_together(s2) & Manner(e1,s2) & on(e1,x3) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_man(x2) & n_group(x1))
exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_man(x1))