The girl in the pink clothing scribbled in the sand with her finger while a girl clad in a blue green shirt looked in the ocean.
A couple of girls are at the beach.
One girl is in the pink clothing while the other one is clad in a blue green shirt implies that there are a couple of girls.
exists e1 p1 s1 x1 x2 x3 x4 x8.(n_ocean(x8) & n_sand(x4) & n_finger(x3) & of(x3,x1) & n_female(x1) & n_clothing(x2) & a_pink(s1) & Theme(s1,x2) & n_girl(x1) & exists e2 s2 s3 x5 x6 x7.(in(e2,x8) & Actor(e2,x5) & v_look(e2) & in(x5,x7) & n_shirt(x7) & a_green(s3) & Theme(s3,x7) & a_blue(s2) & Theme(s2,x7) & n_clad(x5) & of(x5,x6) & n_girl(x6)) & while(e1,p1) & in(e1,x4) & with(e1,x3) & Actor(e1,x1) & v_scribble(e1) & in(x1,x2))
exists p1 x1 x2 x3.(n_beach(x3) & at(x1,x3) & of(x1,x2) & n_girl(x2) & n_couple(x1))