Two people looking at each other, a third person is not attentive.
Two people are looking at each other.
In both sentences looking is the key component.  In the first sentence two people looking and in the second two people are looking.
exists s1 x1.(-exists e1 s2 x2 x3.(rel(s2,x2) & all x4.(n_other(x4) -> at(e1,x4)) & Actor(e1,x3) & v_look(e1) & (x2 = x3) & n_people(x2) & card_eq_2(x2) & Theme(s2,x1) & a_attentive(s2)) & n_person(x1) & a_third(s1) & Theme(s1,x1))
exists e1 x1.(all x2.(n_other(x2) -> at(e1,x2)) & Actor(e1,x1) & v_look(e1) & n_people(x1) & card_eq_2(x1))