Find the name of the scientist who worked on both a project named 'Matter of Time' and a project named 'A Puzzling Parallax'.
return scientists ;return #1 who  worked on  project named  'Matter of  Time ;return #1 who  worked on  project named  'A Puzzling Parallax ;return name of  #1 in both #2 and #3
['select', 'filter', 'filter', 'intersection']