Who is the writer of the episode called "Ambush" (part 1)?
{'header': ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'U.S. viewers (millions)'], 'page_title': '', 'section_title': '', 'caption': '', 'rows': [['122', '1', '"Dangerous Son"', 'Sam Hill', 'Marc Dube & Krystal Houghton', 'September24,2007', '15.08'], ['123', '2', '"Cyber-lebrity"', 'Matt Earl Beesley', 'Corey Evett & Matt Partney', 'October1,2007', '14.72'], ['124', '3', '"Inside Out"', 'Gina Lamar', 'Sunil Nayar & John Haynes', 'October8,2007', '14.45'], ['125', '4', '"Bang, Bang, Your Debt"', 'Karen Gaviola', "Brian Davidson & Barry O'Brien", 'October15,2007', '15.59'], ['126', '5', '"Deep Freeze"', 'Sam Hill', 'Elizabeth Devine', 'October22,2007', '15.66'], ['127', '6', '"Sunblock"', 'Christine Moore', 'Corey Miller', 'October29,2007', '14.85'], ['128', '7', '"Chain Reaction"', 'Scott Lautanen', 'Brian Davidson, Matt Partney & Corey Evett', 'November5,2007', '14.07'], ['129', '8', '"Permanent Vacation"', 'Eagle Egilsson', "Barry O'Brien & Krystal Houghton", 'November12,2007', '15.46'], ['130', '9', '"Stand Your Ground"', 'Joe Chappelle', 'Marc Dube & John Haynes', 'November19,2007', '15.83'], ['131', '10', '"CSI: My Nanny"', 'Jonathan Glassner', 'Corey Miller & Krystal Houghton', 'November26,2007', '15.58'], ['132', '11', '"Guerillas in the Mist"', 'Carey Meyer', "Barry O'Brien & Brian Davidson", 'December10,2007', '14.11'], ['133', '12', '"Miami Confidential"', 'Sam Hill', 'Marc Dube', 'December17,2007', '14.01'], ['134', '13', '"Raising Caine"', 'Gina Lamar', 'Sunil Nayar', 'January14,2008', '14.80'], ['135', '14', '"You May Now Kill the Bride"', 'Eagle Egilsson', "Barry O'Brien", 'March24,2008', '16.06'], ['136', '15', '"Ambush" (Part 1)', 'Sam Hill', 'Corey Evett & Matt Partney', 'March31,2008', '15.65'], ['137', '16', '"All In" (Part 2)', 'Joe Chappelle', 'Krystal Houghton', 'April1,2008', '14.23'], ['138', '17', '"To Kill a Predator"', 'Matt Earl Beesley', 'Brian Davidson', 'April21,2008', '14.38'], ['139', '18', '"Tunnel Vision"', 'Karen Gaviola', 'Tamara Jaron', 'April28,2008', '13.88'], ['140', '19', '"Rock and a Hard Place"', 'Gina Lamar', 'Marc Dube', 'May5,2008', '14.11'], ['141', '20', '"Down to the Wire"', 'Eagle Egilsson', 'Sunil Nayar', 'May12,2008', '13.92']]}