A blond-haired boy wearing a checkered shirt and black shoes is at the lakeside.
The boy is a lifeguard.
Just because the boy is at a lakeside does not mean he is a lifeguard.
exists e1 p1 s1 s2 s3 x1 x2 x3 x4 x5 x6.(n_lakeside(x6) & at(x1,x6) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & subset_of(x5,x3) & n_shoe(x5) & a_black(s3) & Theme(s3,x5) & subset_of(x4,x3) & n_shirt(x4) & a_checkered(s2) & Theme(s2,x4) & (x1 = x2) & n_boy(x1) & a_blond-haired(s1) & Theme(s1,x1))
exists p1 x1.(n_boy(x1) & exists x2.((x1 = x2) & n_lifeguard(x2)))