A male walks on the graffiti wall.
An old woman waits in line at the gas station.
It is either a male or an old woman.
exists e1 x1 x2 x3.(n_wall(x2) & of(x2,x3) & n_graffitus(x3) & on(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_male(x1))
exists s1 x1 x2 x3 x4 x5.(n_station(x4) & of(x4,x5) & n_gas(x5) & a_topic(x1) & in(x1,x3) & at(x3,x4) & n_line(x3) & n_wait(x1) & of(x1,x2) & n_woman(x2) & a_old(s1) & Theme(s1,x1))