The fruits should be treated with lemon juice when sliced to prevent oxidation.
there are other ways to prevent oxidation on fruits other than treating them with lemon juice
there are not necessarily other ways to prevent oxidation on fruits other than treating them with lemon juice.
exists e1 p1 x1.(n_fruit(x1) & exists e2 e3 p2 x2 x3.(when(e2,e3) & Recipient(e3,p2) & Topic(e3,x1) & v_slice(e3) & exists e4 x4.(Theme(e4,x4) & Actor(e4,x1) & v_prevent(e4) & n_oxidation(x4)) & with(e2,x2) & n_juice(x2) & of(x2,x3) & n_lemon(x3) & Theme(e2,x1) & v_treat(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_should(e1))
exists p1 x1 x3.(n_thing(x3) & n_way(x3) & exists p2 x2.((x1 = x2) & Topic(x2,p2) & exists e2 e1 s1 x4 x5 x6 x7 x8.(on(e1,x5) & than(s1,e2) & with(e2,x7) & n_juice(x7) & of(x7,x8) & n_lemon(x8) & Theme(e2,x3) & Actor(e2,x6) & v_treat(e2) & Theme(s1,x6) & a_other(s1) & (x5 = x6) & n_fruit(x5) & Theme(e1,x4) & Actor(e1,x2) & v_prevent(e1) & n_oxidation(x4)) & -(x2 = x3) & n_way(x2)))