is the value of pco2 of patient 49295 measured at 2103-06-12 04:15:00 greater than the value measured at 2103-06-10 21:14:00?
select ( select labevents.valuenum from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 49295 ) and labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'pco2' ) and labevents.charttime = '2103-06-12 04:15:00' ) > ( select labevents.valuenum from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 49295 ) and labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'pco2' ) and labevents.charttime = '2103-06-10 21:14:00' )