A man and a boy go hiking through the forest.
The man and his son were hiking through the forest.
A man and a boy are a man and his son, and go hiking is a paraphrase of were hiking.
exists e1 p1 x1 x2 x3 x4.(n_forest(x4) & exists e2.(through(e2,x4) & Actor(e2,x1) & v_hike(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_go(e1) & subset_of(x3,x1) & n_boy(x3) & subset_of(x2,x1) & n_man(x2))
exists e1 x1 x2 x3 x4.(n_forest(x4) & n_son(x3) & of(x3,x2) & n_male(x2) & n_man(x2) & through(e1,x4) & Actor(e1,x1) & v_hike(e1) & subset_of(x3,x1) & subset_of(x2,x1))