Two girls crouch in front of some bushes and talk on their phones.
The girls are completely hidden by the bushes.
Two girls crouching in front of some bushes are not necessarily hidden.
exists e1 x1 x2 x3 x4 x5 x6.(in(e1,x2) & of(x2,x3) & on(x3,x6) & n_phone(x6) & of(x6,x1) & n_thing(x1) & n_talk(x5) & n_bush(x4) & subset_of(x5,x3) & subset_of(x4,x3) & n_front(x2) & Actor(e1,x1) & v_crouch(e1) & n_girl(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(n_bush(x2) & n_girl(x1) & a_completely(s1) & Manner(e1,s1) & Actor(e1,x2) & Theme(e1,x1) & v_hide(e1))