user: Question: Who was the directed for the episode titled "Twister: Part 1"?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original U.S. air date', 'Prod. code', 'Viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [50.0, 1.0, '"The Silent Treatment"', 'Phill Lewis', 'Dan Signer', 'July2,2010', 305.0, '3.4']
SQL:

assistant: SELECT "Directed by" FROM "Table" WHERE "Title" = '"Twister: Part 1"';