CREATE TABLE table_28761 ("Dist." FLOAT, "Democratic Coalition" TEXT, "Alliance" TEXT, "Together We Can Do More" TEXT, "Independent Regional Force" TEXT, "Independents" TEXT)

What is the democratic coalation when together we can do more is sergio castro ( pc )?
SELECT "Democratic Coalition" FROM table_28761 WHERE "Together We Can Do More" = 'Sergio Castro ( PC )'
SELECT "Democratic Coalition" FROM "table_28761" WHERE "Together We Can Do More" = 'Sergio Castro ( PC )'