CREATE TABLE "indianapolis_colts_draft_history" (
  "round" real,
  "pick_num" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);

Question: What is Ken Walter's lowest pick number with an overall pick number larger than 195?
SQL: SELECT MIN("pick_num") FROM "indianapolis_colts_draft_history" WHERE "name"='ken walter' AND "overall">195;