when did the last laboratory test of patient 97395 take place since 07/2105?
select labevents.charttime from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 97395 ) and strftime('%y-%m',labevents.charttime) >= '2105-07' order by labevents.charttime desc limit 1