Students in a classroom of some sort are doing art projects.
The students are being taught an algebra lesson.
Students are either doing art projects or being taught an algebra lesson.
exists e1 x1 x2 x3 x4 x5.(Theme(e1,x4) & Actor(e1,x1) & v_do(e1) & n_project(x4) & of(x4,x5) & n_art(x5) & in(x1,x2) & of(x2,x3) & n_sort(x3) & n_classroom(x2) & n_student(x1))
exists e1 x1 x2 x3.(n_student(x1) & Recipient(e1,x2) & Theme(e1,x1) & v_teach(e1) & n_lesson(x2) & of(x2,x3) & n_algebra(x3))