A man and woman fishing at the beach.
They enjoy the hot tub
Sentence one is a man and a woman fishing Sentence two is more vague about who "they" are, and is about two or more people in a hot tub
exists s1 x1 x2 x3 x4.(n_beach(x4) & a_topic(s1) & subset_of(x2,s1) & at(x2,x4) & n_fishing(x2) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1))
exists e1 s1 x1 x2.(n_tub(x2) & a_hot(s1) & Theme(s1,x2) & n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1))