Database: toxicology
Question: How many bonds which involved atom 12 does molecule TR009 have?
SQL: SELECT COUNT(T2.bond_id) FROM bond AS T1 INNER JOIN connected AS T2 ON T1.bond_id = T2.bond_id WHERE T1.molecule_id = 'TR009' AND T2.atom_id = T1.molecule_id || '_1' AND T2.atom_id2 = T1.molecule_id || '_2'