The men are climbing.
The men were climbing up a large mountain.
Just because men are climbing does not mean they are climbing up a large mountain.
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_climb(e1))
exists e1 s1 s2 x1 x2.(n_man(x1) & a_up(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_mountain(x2) & a_large(s1) & Theme(s1,x2))