CREATE TABLE table_19189856_1 (first_performance VARCHAR, performer VARCHAR)

how many first performances where performer is wilfred engelman category:articles with hcards
SELECT COUNT(first_performance) FROM table_19189856_1 WHERE performer = "Wilfred Engelman category:Articles with hCards"
SELECT COUNT("first_performance") FROM "table_19189856_1" WHERE "Wilfred Engelman category:Articles with hCards" = "performer"