most aggressive and most sincere attempt 
(ROOT (NP (ADJP (ADJP (RBS most) (JJ aggressive)) (CC and) (ADJP (RBS most) (JJ sincere))) (NN attempt)))
(ROOT (NP (ADJP (ADJP (RBS ) (JJ )) (CC ) (ADJP (RBS ) (JJ ))) (NN )))