The man and woman are talking outside at night.
A man is proposing
Just because a man and a woman are talking outside at night does not mean that the man is proposing.
exists e1 s1 x1 x2 x3 x4.(n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & at(e1,x4) & n_night(x4) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_talk(e1))
exists e1 x1.(Actor(e1,x1) & v_propose(e1) & n_man(x1))