What nurses are on call with block floor 1 and block code 1? Tell me their names.
return nurses ;return #1 on call ;return block  floors of #2 ;return block  codes of #2 ;return #2 where #3 is  1 ;return #2 where #4 is  1 ;return #2 in both #5 and #6 ;return the  names of #7
['select', 'filter', 'project', 'project', 'comparative', 'comparative', 'intersection', 'project']