how many first performances where performer is wilfred engelman category:articles with hcards
CREATE TABLE "table1_19189856_1" (
  "performer" text,
  "performances" real,
  "category" text,
  "first_performance" text,
  "last_performance" text
);
SELECT COUNT("first_performance") FROM "table1_19189856_1" WHERE "performer"='Wilfred Engelman Category:Articles with hCards';