People are being photographed while mountain climbing or hiking.
People outside hiking.
People outside hiking rephrasing that people are being photographed
exists e1 x1 x2 x3.(while(e1,x2) & (n_climb(x2) | n_hike(x2)) & of(x2,x3) & n_mountain(x3) & Theme(e1,x1) & v_photograph(e1) & n_people(x1))
exists x1 x2.(a_topic(x1) & outside(x1,x2) & n_hiking(x2) & n_people(x1))