Complex sentence: The Soviet Union and now Russia dispute this position and consider the Spitsbergen Treaty to apply to the entire zone; talks were held in 1978 in Moscow, but did not resolve the issue.
Split into simpler sentences: The Soviet Union/Russia disputed and continuesd to dispute this position and consider the Spitsbergen Treaty to apply to the entire zone. Talks were held in 1978 in Moscow but did not resolve the issue.