Which site has a Cost free and a Editor of jsvi?
CREATE TABLE "list_of_source_code_editors" (
  "editor" text,
  "site" text,
  "style_clone_of" text,
  "cost_us" text,
  "open_source" text,
  "activity" text
);
SELECT "site" FROM "list_of_source_code_editors" WHERE "cost_us"='free' AND "editor"='jsvi';