what is the last performance of leon varkas category:articles with hcards
CREATE TABLE "table1_19189856_1" (
  "performer" text,
  "performances" real,
  "category" text,
  "first_performance" text,
  "last_performance" text
);
SELECT "last_performance" FROM "table1_19189856_1" WHERE "performer"='Leon Varkas Category:Articles with hCards';