Two athletic men climbing a waterfall.
Two men climbed the waterfall.
If you climbed the waterfall at one time they were climbing it.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_climb(e1) & n_waterfall(x3) & (x1 = x2) & n_man(x1) & a_athletic(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(n_waterfall(x2) & Time(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_man(x1) & card_eq_2(x1))