(S (S (S (BASENP (NNP Russia)) (VP (VP (VP (VBD apologised) (PP (TO to) (BASENP (NNP Finland)))) (BASENP (JJ last) (NN year))) (PP (VBG following) (NP (BASENP (DT a) (JJ large) (NN number)) (PP (IN of) (NP (NP (BASENP (JJ similar) (NNS incidents)) (PP (IN over) (BASENP (DT the) (NN space)))) (PP (IN of) (BASENP (NN two) (NNS years))))))))) (CONJP (COMMA ,) (CC but)) (SBAR (RB only) (SBAR (IN after) (S (BASENP (NNP Finland)) (VP (VBD had) (VP (VBN protested))))))) (PERIOD .))