What is the teacher's account ID for the project that got the donation at 11:38:43 on 2008/7/29 ?
donation at 11:38:43 on 2008/7/29 refers to donation_timestamp = '2008/7/29 11:38:43'; teacher's account ID refers to teacher_acctid;
SELECT T1.teacher_acctid FROM essays AS T1 INNER JOIN donations AS T2 ON T1.projectid = T2.projectid WHERE T2.donation_timestamp LIKE '2008-07-29 11:38:43.361'