Database: toxicology
Question: Which type of label is the most numerous in atoms with hydrogen?
SQL: SELECT T.label FROM ( SELECT T2.label, COUNT(T2.molecule_id) FROM atom AS T1 INNER JOIN molecule AS T2 ON T1.molecule_id = T2.molecule_id WHERE T1.element = 'h' GROUP BY T2.label ORDER BY COUNT(T2.molecule_id) DESC LIMIT 1 ) t