how many times does in 06/2105 patient 65401 get a specific gravity test?
select count(*) from labevents where labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'specific gravity' ) and labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 65401 ) and strftime('%y-%m',labevents.charttime) = '2105-06'