An elderly man in a blue jacket with a camera case over his shoulder standing by his bicycle taking pictures.
A young man takes pictures from his motorcycle.
The man cannot be both elderly and young.  A bicycle is not a motorcycle.  To take pictures from something, one cannot be standing by it.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(a_topic(x1) & in(x1,x2) & with(x2,x3) & over(x3,x5) & by(x5,x7) & Theme(e1,x9) & Actor(e1,x8) & v_take(e1) & n_picture(x9) & (x7 = x8) & n_bicycle(x7) & of(x7,x1) & n_male(x1) & n_male(x1) & n_standing(x5) & of(x5,x6) & n_shoulder(x6) & of(x5,x1) & n_case(x3) & of(x3,x4) & n_camera(x4) & n_jacket(x2) & a_blue(s2) & Theme(s2,x2) & n_man(x1) & a_elderly(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(from(e1,x3) & n_motorcycle(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))