Men working with heavy equipment in a mine shaft.
Men are trying to find coal
Just because men are in a mine shaft does not mean they're trying to find coal.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x4) & n_shaft(x4) & of(x4,x5) & n_mine(x5) & with(e1,x3) & n_equipment(x3) & a_heavy(s1) & Theme(s1,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_find(e2) & n_coal(x2)) & n_man(x1))