In the words of a newspaper ad for a language school,  Do Mistake'Learn Better. 
( ( In ( ( the words ) ( of ( a ( newspaper ad ) ) ) ) ) ( ( for ( a ( language school ) ) ) ( , ( ( Do ( Mistake'Learn Better ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NP (DT the) (NNS words)) (PP (IN of) (NP (DT a) (NN newspaper) (NN ad))))) (PP (IN for) (NP (DT a) (NN language) (NN school))) (, ,) (VP (VBP Do) (S (NP (NNP Mistake'Learn)) (ADJP (RBR Better)))) (. .)))
The ad posted in the newspaper was promoting a language school.
( ( The ad ) ( ( posted ( in ( ( the newspaper ) ( was ( promoting ( a ( language school ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN ad)) (VP (VBD posted) (SBAR (IN in) (S (NP (DT the) (NN newspaper)) (VP (VBD was) (VP (VBG promoting) (NP (DT a) (NN language) (NN school))))))) (. .)))