People gather on a bridge near a weeping willow tree.
The people are gathered outside.
Weeping willow tree implies outside, and people gather is a paraphrase of people are gathered.
exists e1 e2 x1 x2 x3 x4.(on(e1,x2) & near(x2,x3) & n_tree(x3) & of(x3,x4) & n_willow(x4) & Actor(e2,x3) & v_weep(e2) & n_bridge(x2) & Actor(e1,x1) & v_gather(e1) & n_people(x1))
exists e1 s1 x1.(n_people(x1) & a_outside(s1) & Manner(e1,s1) & Theme(e1,x1) & v_gather(e1))