An adult and a child sitting down and both are biting their fingernails.
The adult is the child's parent.
An adult and a child sitting down and both are biting their fingernails does not indicate that the adult is the child's parent.
exists e3 e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(Theme(e3,x6) & Actor(e3,x1) & v_bite(e3) & n_fingernail(x6) & of(x6,x2) & n_thing(x2) & subset_of(x3,x1) & a_both(s2) & Manner(e2,s2) & Actor(e2,x5) & v_sit(e2) & (x3 = x5) & a_down(s1) & Manner(e1,s1) & Actor(e1,x4) & v_sit(e1) & (x3 = x4) & n_child(x3) & subset_of(x2,x1) & n_adult(x2))
exists p1 x1 x2 x3.(n_parent(x3) & of(x3,x2) & n_child(x2) & n_adult(x1) & (x1 = x3))