Question: What was the venue when David Jacobs was the host?
SQL: SELECT "Venue" FROM "2-1851063-10" WHERE "Semi final/heat host" = 'David Jacobs';

Question: What was the host for the semi final heat, when Terry Wogan was the National Final main host, and Gaby Roslin was the National Final co-host?
SQL: SELECT "Semi final/heat host" FROM "2-1851063-10" WHERE "National final main host" = 'Terry Wogan' AND "National final co host" = 'Gaby Roslin';

Question: What is the name of the national final main host when the semi final/heat host shows Internal selection in 2011?
SQL: SELECT "National final main host" FROM "2-1851063-10" WHERE "Semi final/heat host" = 'Internal selection' AND "Year(s)" = '2011';

Question: What is the name of the national final co host when David Jacobs was the National final main host, and the selection show was A Song For Europe in 1966?
SQL: SELECT "National final co host" FROM "2-1851063-10" WHERE "National final main host" = 'David Jacobs' AND "Selection show" = 'A Song For Europe' AND "Year(s)" = '1966';

Question: What is the selection show in 1969 when the Semi final/heat host shows there was No semi final/heat.
SQL: SELECT "Selection show" FROM "2-1851063-10" WHERE "Semi final/heat host" = 'No semi final/heat' AND "Year(s)" = '1969';

Question: What is the name of the national final main host at BBC Television Centre, and the selection show was Eurovision: Your Country Needs You?
SQL: SELECT "National final main host" FROM "2-1851063-10" WHERE "Venue" = 'BBC Television Centre' AND "Selection show" = 'Eurovision: Your Country Needs You';