What is the area when the poor law union is skibbereen and the townland is knockmore?
CREATE TABLE "table1_30121075_1" (
  "townland" text,
  "area_acres" real,
  "barony" text,
  "civil_parish" text,
  "poor_law_union" text
);
SELECT "area_acres" FROM "table1_30121075_1" WHERE "poor_law_union"='Skibbereen' AND "townland"='Knockmore';