A group of men are cleaning up debris
The men work together to clean.
If a group is cleaning up debris, it follows that they are working together to clean.
exists e1 s1 x1 x2 x3.(a_up(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x1) & v_clean(e1) & n_debris(x3) & of(x1,x2) & n_man(x2) & n_group(x1))
exists e1 p1 s1 x1.(n_man(x1) & Topic(e1,p1) & exists e2.(Actor(e2,x1) & v_clean(e2)) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1))