Question: What is the decay constant with a half-life less than 22.72, a yield, neutrons per fission of 0.0031000000000000003, and a group number less than 3?
SQL: SELECT COUNT Decay Constant (s −1 ) FROM table WHERE Half-Life (s) < 22.72 AND Yield, Neutrons per Fission = 0.0031000000000000003 AND Group < 3