How many molecules without sulphur element is not having double bond?
double bond refers to bond_type = ' = '; bond_type ! = ' = '; sulphur refers to element = 's'
SELECT COUNT(DISTINCT T1.molecule_id) FROM atom AS T1 INNER JOIN bond AS T2 ON T1.molecule_id = T2.molecule_id WHERE T1.element <> 's' AND T2.bond_type <> '='