A male and female singing a song together outside.
Two people are outside.
A male and a female can be referred to as two people.
exists e1 s1 s2 s3 x1 x2 x3 x4.(a_topic(s1) & a_outside(s3) & Manner(e1,s3) & a_together(s2) & Manner(e1,s2) & Theme(e1,x4) & Actor(e1,x3) & v_sing(e1) & n_song(x4) & (s1 = x3) & n_female(x2) & n_male(x1) & subset_of(x2,s1) & subset_of(x1,s1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_people(x1) & card_eq_2(x1))