Table schema:
CREATE TABLE table_2263152_1 (version VARCHAR, features VARCHAR, distribution_mechanism VARCHAR)

Question: If the distribution mechanism is windows nt 4.0 option pack Microsoft office 97 and the features is service release, what is the version?
SQL: SELECT version FROM table_2263152_1 WHERE features = "Service release" AND distribution_mechanism = "Windows NT 4.0 Option Pack Microsoft Office 97"