With Washington hinting it might soften its tough stance to break the deadlock, top US negotiator, Christopher Hill, said the two sides needed to review the situation.
Christopher Hill prefers to be called Chris
( z1 prefer :ARG0 ( z2 person :name ( z3 name :op "Christopher" :op "Hill" ) ) :ARG1 ( z4 call :ARG1 z2 :ARG2 z2 ) )