Question: What was Mark Begich polling on October 6, 2008?
SQL: SELECT "Democrat: Mark Begich" FROM "1-16751596-13" WHERE "Dates administered" = 'October 6, 2008';

Question: When the poll source is Research 2000/Daily Kos, what is the total number of dates administered? 
SQL: SELECT COUNT("Dates administered") FROM "1-16751596-13" WHERE "Poll Source" = 'Research 2000/Daily Kos';

Question: On July 17, 2008, what was the total number of lead maragin? 
SQL: SELECT COUNT("Lead Maragin") FROM "1-16751596-13" WHERE "Dates administered" = 'July 17, 2008';