Question: What is the building for the R90 pennant?
SQL: SELECT "Builder" FROM "2-1206583-2" WHERE "Pennant" = 'R90';

Question: What is the pennant with Denny, Dumbarton as the builder?
SQL: SELECT "Pennant" FROM "2-1206583-2" WHERE "Builder" = 'Denny, Dumbarton';

Question: What is the laid down date of the destroyer with a R29 pennant?
SQL: SELECT "Laid Down" FROM "2-1206583-2" WHERE "Pennant" = 'R29';