A young, blond boy sitting in a white chair beside cactus plants is eating a sandwich.
a child is outside eating lunch
The fact that a child is eating a sandwich doesn't imply they are eating lunch.
exists e2 e1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6.(Theme(e2,x6) & Actor(e2,x1) & v_eat(e2) & n_sandwich(x6) & beside(e1,x4) & n_plant(x4) & of(x4,x5) & n_cactus(x5) & in(e1,x3) & n_chair(x3) & a_white(s4) & Theme(s4,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_boy(x1) & a_blond(s3) & Theme(s3,x1) & a_,(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1.(exists s1 x2 x3.((x1 = x2) & n_lunch(x2) & of(x2,x3) & n_eating(x3) & a_outside(s1) & Theme(s1,x2)) & n_child(x1))