CREATE TABLE table_8869 ("Name" TEXT, "Nationality" TEXT, "Position" TEXT, "Crewe Alexandra career" TEXT, "Appearances" FLOAT, "Goals" FLOAT)

What is the number of goals when the position is DF, the nationality is England, and the Crewe Alexandra career is 1948 1951?
SELECT COUNT("Goals") FROM table_8869 WHERE "Position" = 'df' AND "Nationality" = 'england' AND "Crewe Alexandra career" = '1948–1951'
SELECT COUNT("Goals") FROM "table_8869" WHERE "Crewe Alexandra career" = '1948–1951' AND "Nationality" = 'england' AND "Position" = 'df'