question: What is the number of successes for rockets that have more than 3 launches, were based in Russia, are type soyuz and a rocket type of soyuz-u?
answer: SELECT COUNT(successes) FROM table_name_92 WHERE launches > 3 AND country = "russia" AND type = "soyuz" AND rocket = "soyuz-u"
context: CREATE TABLE table_name_92 (successes VARCHAR, rocket VARCHAR, type VARCHAR, launches VARCHAR, country VARCHAR)