A woman in a red dress is standing next to a girl looking at water.
There are multiple people present.
Multiple people implies more than one which is the same case in sentence 1  where a woman and a girl are looking at water .
exists e1 e2 s1 x1 x2 x3 x4.(for(e1,e2) & at(e2,x4) & n_water(x4) & Actor(e2,x1) & v_look(e2) & to(e1,x3) & n_girl(x3) & r_next(e1) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_dress(x2) & a_red(s1) & Theme(s1,x2) & n_woman(x1))
exists p1 x1 s1 s2 x2 x3.((x1 = x2) & Theme(s2,x3) & a_present(s2) & (x2 = x3) & n_people(x2) & a_multiple(s1) & Theme(s1,x2))