How many violines are suggested in the "Arranged by Nelson Riddle" reference with section size of 12 players?
CREATE TABLE "suggested_string_section_sizes" (
  "reference" text,
  "author" text,
  "section_size" text,
  "violins" real,
  "violas" real,
  "celli" real,
  "basses" real
);
SELECT "violins" FROM "suggested_string_section_sizes" WHERE "reference"='\"Arranged By Nelson Riddle\"' AND "section_size"='12 players';