A man with short hair and a child are sitting as the child opens a present.
The father looks on as his daughter opens her birthday present.
Just because man with short hair and a child are sitting as the child opens a present doesn't mean it is the father.
exists e1 p1 s1 x1 x2 x3 x4.(exists e2 x5.(Theme(e2,x5) & Actor(e2,x4) & v_open(e2) & n_present(x5)) & n_child(x4) & n_child(x4) & as(e1,p1) & Actor(e1,x1) & v_sit(e1) & with(x1,x2) & subset_of(x4,x2) & subset_of(x3,x2) & n_hair(x3) & a_short(s1) & Theme(s1,x3) & n_man(x1))
exists e1 e2 x1 x2 x3 x4 x5.(n_present(x4) & of(x4,x5) & n_birthday(x5) & of(x4,x2) & n_female(x2) & n_daughter(x2) & of(x2,x1) & n_male(x1) & n_father(x1) & r_on(e1) & as(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_open(e2) & (x2 = x3) & Actor(e1,x1) & v_look(e1))