What is wrong with below script
select 'EXEC sp_dropextendedproperty
@name = ''MS_Description''
,@level0type = ''schema''
,@level0name = ' + object_schema_name(extended_properties.major_id) + '
,@level1type = ''table''
,@level1name = ' + object_name(extended_properties.major_id)
from...