What is the lead percentage when the socialist is at 35.5%?
{'header': ['Date Released', 'Institute', 'Socialist', 'Social Democratic', 'Green-Communist', 'Left Bloc', 'Peoples Party', 'Lead'], 'page_title': 'European Parliament election, 2009 (Portugal)', 'section_title': 'Opinion Polling and preliminary exit polls', 'caption': '12 seats needed for a majority', 'rows': [['7 June 2009', 'Election Results', '26.5% 7 seats', '31.7% 8 seats', '10.6% 2 seats', '10.7% 3 seats', '8.4% 2 seats', '5.2%'], ['7 June 2009', 'Exit Poll – RTP1 Universidade Católica', '28.0% – 33.0% 7 – 8 seats', '29.0% – 34.0% 8 – 9 seats', '9.0% – 12.0% 2 – 3 seats', '9.0% – 12.0% 2 seats', '7.0% – 10.0% 2 seats', '1.0%'], ['7 June 2009', 'Exit Poll – SIC Eurosondagem', '27.7% – 31.5% 7 – 8 seats', '29.2% – 33.0% 7 – 8 seats', '9.5% – 11.3% 2 – 3 seats', '11.6% – 13.4% 3 seats', '7.5% – 9.3% 2 seats', '1.5%'], ['7 June 2009', 'Exit Poll – TVI INTERCAMPUS', '24.1% – 28.1% 6 – 8 seats', '30.4% – 34.4% 8 – 9 seats', '9.7% – 12.7% 2 – 3 seats', '9.8% – 12.8% 2 – 3 seats', '6.7% – 9.3% 1 – 2 seats', '6.3%'], ['5 June 2009', 'Universidade Católica', '34.0%', '32.0%', '11.0%', '9.0%', '4.0%', '2.0%'], ['5 June 2009', 'Eurosondagem', '36.0%', '31.9%', '9.0%', '10.1%', '6.1%', '4.1%'], ['4 June 2009', 'Aximage', '36.2%', '30.9%', '10.1%', '10.2%', '5.0%', '5.3%'], ['4 June 2009', 'Marktest', '29.4%', '32.5%', '8.9%', '8.9%', '3.3%', '3.1%'], ['1 June 2009', 'Marktest', '31.9%', '30.1%', '7.1%', '7.1%', '4.7%', '1.8%'], ['29 May 2009', 'Eurosondagem', '35.5%', '32.5%', '9.2%', '8.8%', '6.5%', '3.0%'], ['22 May 2009', 'Eurosondagem', '34.3%', '32.1%', '8.9%', '10.1%', '6.9%', '2.2%'], ['9 May 2009', 'Marktest', '33.1%', '32.9%', '7.6%', '8.4%', '4.5%', '0.2%'], ['1 May 2009', 'Universidade Católica', '39.0%', '36.0%', '7.0%', '12.0%', '2.0%', '3.0%'], ['24 April 2009', 'INTERCAMPUS', '34.0%', '33.5%', '7.9%', '18.0%', '6.9%', '0.5%'], ['13 June 2004', 'Election Results', '44.5% 12 seats', '33.3% 7 seats', '9.1% 2 seats', '4.9% 1 seats', '—* 2 seats', '11.2%']]}