What class year was Vencie Glenn from? 
CREATE TABLE "sycamores_in_professional_leagues_50" (
  "player" text,
  "class_year" real,
  "position" text,
  "teams" text,
  "career" text,
  "highlight_s" text
);
SELECT MIN("class_year") FROM "sycamores_in_professional_leagues_50" WHERE "player"='Vencie Glenn';