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.
the scenario was clear and action could be taken immediately
( z1 and :op ( z2 clear :ARG1 ( z3 scenario ) ) :op ( z4 possible :ARG1 ( z5 act :time ( z6 immediate ) ) ) )