In 1973, the United States and Communist China agreed to establish liaison offices in Beijing and Washington.
The US doesn't normally agree with China
( z1 agree :polarity - :ARG0 ( z2 country :name ( z3 name :op "US" ) ) :ARG2 ( z4 country :name ( z5 name :op "China" ) ) :ARG1-of ( z6 normal ) )