Three girls in a classroom with blue and brown desks.
The girls are in math class.
Classroom doesn't necessarily mean math.
exists s1 s2 x1 x2 x3.(a_topic(x1) & in(x1,x2) & with(x2,x3) & n_desk(x3) & a_brown(s2) & Theme(s2,x3) & a_blue(s1) & Theme(s1,x3) & n_classroom(x2) & n_girl(x1) & card_eq_3(x1))
exists p1 x1.(n_girl(x1) & exists x2 x3.(in(x1,x2) & n_class(x2) & of(x2,x3) & n_math(x3)))