A lone protester in a black jacket on the sidewalk.
A protestor is at a computer in the library
not every protestor is lone
exists s1 s2 x1 x2 x3.(n_sidewalk(x3) & a_topic(x1) & in(x1,x2) & on(x2,x3) & n_jacket(x2) & a_black(s2) & Theme(s2,x2) & n_protester(x1) & a_lone(s1) & Theme(s1,x1))
exists p1 x1 x3.(n_library(x3) & exists x2.(at(x1,x2) & in(x2,x3) & n_computer(x2)) & n_protestor(x1))