How yes votes were there for measure 4? 
CREATE TABLE "may_1974_election" (
  "meas_num" real,
  "passed" text,
  "yes_votes" real,
  "no_votes" real,
  "pct_yes" text,
  "const_amd" text,
  "type" text,
  "description" text
);
SELECT MAX("yes_votes") FROM "may_1974_election" WHERE "meas_num"=4;