###HUMAN: was the value of calculated total co2 of patient 14671 second measured on the current hospital visit less than its value first measured on the current hospital visit?, ###ASSISTANT: SELECT (SELECT labevents.valuenum FROM labevents WHERE labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 14671 AND admissions.dischtime IS NULL) AND labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'calculated total co2') ORDER BY labevents.charttime LIMIT 1 OFFSET 1) < (SELECT labevents.valuenum FROM labevents WHERE labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 14671 AND admissions.dischtime IS NULL) AND labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'calculated total co2') ORDER BY labevents.charttime LIMIT 1)