Two girls watch a reaction while mixing liquids on a lab table.
Two girls mix liquids.
Girls who watch a reaction while mixing liquids must be said to mix liquids.
exists e1 e2 x1 x2 x3 x4 x5.(while(e1,e2) & on(e2,x4) & n_table(x4) & of(x4,x5) & n_lab(x5) & Theme(e2,x3) & Actor(e2,x1) & v_mix(e2) & n_liquid(x3) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_reaction(x2) & n_girl(x1) & card_eq_2(x1))
exists s1 x1 x2 x3.(n_liquid(x1) & a_.(s1) & Theme(s1,x1) & of(x1,x3) & n_mix(x3) & of(x1,x2) & n_girl(x2) & card_eq_2(x1) & a_topic(x1))