If the intranet entry is Yes, what is the extranet entry for Microsoft Exchange server?
CREATE TABLE "comparison_of_targets" (
  "name" text,
  "public" text,
  "intranet" text,
  "extranet" text,
  "personal_sites" text,
  "team_sites" text,
  "developer" text
);
SELECT "extranet" FROM "comparison_of_targets" WHERE "intranet"='yes' AND "name"='microsoft exchange server';