Many kids are sitting and taking notes.
people sitting and writing
Taking notes does not mean the people have to be writing. There are various forms of note taking.
exists e1 e2 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_take(e2) & n_note(x3) & n_kid(x2) & n_quantity(x2) & Actor(e1,x1) & v_sit(e1) & n_kid(x1) & n_quantity(x1))
exists e1 e2 x1 x2 x3.(a_topic(x1) & Actor(e2,x3) & v_write(e2) & (x1 = x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1))