Four college-aged individuals- two males and two females- sitting on the concrete steps outside of a brick building
Two couples are sitting on the stairs leading to the library entrance.
Just because two males and two females are sitting together doesn't mean they constitute two couples. College-aged individuals can sit on the steps of any brick building and not just at a library entrance.
exists e1 s1 s2 s3 s4 s5 x1 x2 x3 x4 x5 x6 x7.(n_step(x4) & a_concrete(s5) & Theme(s5,x4) & a_topic(s1) & on(e1,x4) & of(x5,x6) & n_building(x6) & of(x6,x7) & n_brick(x7) & outside(x4,x5) & n_thing(x5) & Actor(e1,x3) & v_sit(e1) & (s1 = x3) & n_thing(x2) & card_eq_2(x2) & a_females-(s4) & Theme(s4,x2) & n_male(x1) & subset_of(x2,s1) & subset_of(x1,s1) & card_eq_2(s1) & a_individuals-(s3) & Theme(s3,s1) & a_college-aged(s2) & Theme(s2,s1) & card_eq_4(s1))
exists e2 e1 x1 x2 x3 x4.(n_entrance(x3) & of(x3,x4) & n_library(x4) & n_stair(x2) & for(e1,e2) & to(e2,x3) & Actor(e2,x1) & v_lead(e2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_couple(x1) & card_eq_2(x1))