What are the the approximate translations when the Morphological Category is 1st. plur. perfect?
CREATE TABLE "triconsonantal_roots" (
  "semitological_abbreviation" text,
  "hebrew_name" text,
  "arabic_name" text,
  "morphological_category" text,
  "hebrew_form" text,
  "arabic_form" text,
  "approximate_translation" text
);
SELECT "approximate_translation" FROM "triconsonantal_roots" WHERE "morphological_category"='1st. plur. perfect';