SELECT T3.name FROM assignedto AS T1 JOIN projects AS T2 ON T1.project  =  T2.code JOIN scientists AS T3 ON T1.scientist  =  T3.SSN WHERE T2.name  =  'Matter of Time' INTERSECT SELECT T3.name FROM assignedto AS T1 JOIN projects AS T2 ON T1.project  =  T2.code JOIN scientists AS T3 ON T1.scientist  =  T3.SSN WHERE T2.name  =  'A Puzzling Parallax'
Find the name of the scientist who worked on both a project named 'Matter of Time' and a project named 'A Puzzling Parallax'.
SELECT T3.name FROM assignedto AS T1 JOIN projects AS T2 ON T1.project = T2.code JOIN scientists AS T3 ON T1.scientist = T3.SSN WHERE T2.name = 'Matter of Time ' INTERSECT SELECT T3.name FROM assignedto AS T1 JOIN projects AS T2 ON T1.project = T2.code JOIN scientists AS T3 ON T1.scientist = T3.SSN WHERE T2.name = 'A Puzzling Parallax '
select t3 . name from assignedto as t1 join projects as t2 on t1 . project = t2 . code join scientists as t3 on t1 . scientist = t3 . ssn where t2 . name = value intersect select t3 . name from assignedto as t1 join projects as t2 on t1 . project = t2 . code join scientists as t3 on t1 . scientist = t3 . ssn where t2 . name = value
Find the name of the scientist who worked on both a project named 'Matter of Time ' and a project named 'A Puzzling Parallax ' .