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 US is taking a hard line over this issue
the passage states the US is willing to soften it's stance
( z1 take :ARG0 ( z2 country :name ( z3 name :op "US" ) ) :ARG1 ( z4 line :ARG1-of ( z5 hard ) ) :ARG3 ( z6 issue :mod ( z7 this ) ) )