"You can push around Cuba. If microwaves were used, the technology is not rare, and more than one country could be using it. Radiofrequency energy includes radio waves and microwaves. China and Cuba have denied any such actions. Microwave radiation is considered a subset of RF radiation.
Cuba and China are close friends.
( z0 have-rel-role :ARG0 ( z1 country :name ( z2 name :op "Cuba" ) ) :ARG1 ( z3 country :name ( z4 name :op "China" ) ) :ARG2 ( z5 friend :ARG1-of ( z6 close ) ) )
(z0 / have-rel-role-91
    :ARG0 (z1 / country
              :name (z2 / name
                        :op1 "Cuba"))
    :ARG1 (z3 / country
              :name (z4 / name
                        :op1 "China"))
    :ARG2 (z5 / friend
              :ARG1-of (z6 / close-13)))
Cuba and China are close friends .
z1 :name z2
z2 :op1 1
z3 :name z4
z4 :op1 0
z0 :ARG1 z3
z0 :ARG0 z1
z0 :ARG2 z5
z5 :ARG1-of z6