instruction: how much is the difference of weights of patient 017-101426 second measured on the last hospital visit compared to the first value measured on the last hospital visit?
response: SELECT (SELECT patient.admissionweight FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '017-101426' AND NOT patient.hospitaldischargetime IS NULL ORDER BY patient.hospitaladmittime DESC LIMIT 1) AND NOT patient.admissionweight IS NULL ORDER BY patient.unitadmittime LIMIT 1 OFFSET 1) - (SELECT patient.admissionweight FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '017-101426' AND NOT patient.hospitaldischargetime IS NULL ORDER BY patient.hospitaladmittime DESC LIMIT 1) AND NOT patient.admissionweight IS NULL ORDER BY patient.unitadmittime LIMIT 1)