Find the start and end  dates of behavior incidents of students with last name "Rohan"?
select t1.date_incident_start, t1.date_incident_end from behavior_incident as t1 join students as t2 on t1.student_id = t2.student_id where t2.last_name = "Rohan"
Find the start and end dates of behavior incidents of students with last name "Bergnaum"?
select t1.date_incident_start, date_incident_end from behavior_incident as t1 join students as t2 on t1.student_id = t2.student_id where t2.last_name = "Bergnaum"
Find the start and end dates of behavior incidents of students with last name "Hansen"?
select t2.last_name from behavior_incident as t1 join students as t2 on t1.student_id = t2.student_id where t2.last_name = "Hansen"