A man kayaking down a river with a waterfall in the background.
A man kayaks along a river.
man kayaking down a river simply means man kayaks along a river
exists e1 s1 x1 x2 x3 x4 x5.(n_background(x5) & a_topic(x1) & with(e1,x4) & in(x4,x5) & n_waterfall(x4) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_kayake(e1) & n_river(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(along(e1,x2) & n_river(x2) & Actor(e1,x1) & v_kayak(e1) & n_man(x1))