Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_71217 ( "Group" real, "Half-Life (s)" real, "Decay Constant (s \u22121 )" real, "Yield, Neutrons per Fission" real, "Fraction" real )

### 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?

### Accurate SQL ###

SELECT COUNT("Decay Constant (s \u22121 )") FROM table_71217 WHERE "Half-Life (s)" < '22.72' AND "Yield, Neutrons per Fission" = '0.0031000000000000003' AND "Group" < '3'