An adult and a child sitting down and both are biting their fingernails.
The adult and child are standing up.
One can not be standing and sitting simultaneously.
exists e2 e3 e1 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 e1 s1 x1 x2 x3.(n_child(x3) & n_adult(x2) & subset_of(x3,x1) & subset_of(x2,x1) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1))