Two children in red soccer jerseys are standing on a soccer field.
Children are standing on a field.
To say children by itself, implies more than one child. So to have two children means they can be referred to simply as children. A soccer field is a particular kind of field, whereupon soccer is played.
exists e1 s1 x1 x2 x3 x4 x5.(on(e1,x4) & n_field(x4) & of(x4,x5) & n_soccer(x5) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_jersey(x2) & of(x2,x3) & n_soccer(x3) & a_red(s1) & Theme(s1,x2) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_field(x2) & Actor(e1,x1) & v_stand(e1) & n_child(x1))