Several adults and children are either sliding down, or waiting at the bottom of a very tall yellow slide.
There is only one person present.
If there are several adults and children present, then it would be incorrect to say that there is only one person present.
exists x7.(n_bottom(x7) & (exists e1 s1 s2 s3 x1 x2 x3.(a_either(s3) & Manner(e1,s3) & a_down(s2) & Manner(e1,s2) & Actor(e1,x1) & v_slide(e1) & n_child(x3) & n_adult(x2) & subset_of(x3,x1) & subset_of(x2,x1) & a_several(s1) & Theme(s1,x1)) | exists e2 s4 s5 s6 x4 x5 x6 x8.(at(e2,x7) & of(x7,x8) & n_slide(x8) & a_yellow(s6) & Theme(s6,x8) & a_tall(s5) & Theme(s5,x8) & r_very(x8) & Actor(e2,x4) & v_wait(e2) & n_child(x6) & n_adult(x5) & subset_of(x6,x4) & subset_of(x5,x4) & a_several(s4) & Theme(s4,x4))))
exists p1 x1 s1 x2 x3.((x1 = x2) & Theme(s1,x3) & a_present(s1) & (x2 = x3) & n_person(x2) & card_eq_1(x2) & r_only(x2))