### Question:
StatementCommons { public static Equivalence<Statement> tripleEquivalence() { return TRIPLE_EQUIVALENCE; }  static Equivalence<Statement> tripleEquivalence(); static Equivalence<Statement> quadrupleEquivalence(); static Set<T> newTripleSet(); static Set<T> newQuadrupleSet(); static Map<K,V> newTripleMap(); static Map<K,V> newQuadrupleMap();  }### Answer:
@Test public void testTripleEquivalence() { Equivalence<Statement> e = StatementCommons.tripleEquivalence(); Assert.assertTrue(e.equivalent(stmt1,stmt2)); Assert.assertTrue(e.equivalent(stmt1,stmt4)); Assert.assertFalse(e.equivalent(stmt1,stmt3)); }