sentence: Some days before , we had decided to organize an excursion to a nature trail nearby . As soon as we arrived at the railway station , we were so fascinated by what surrounded us that we walked for three hours along a path , Suddenly , our surroundings appeared to be far wilder than they had been before , so we stopped trekking and we had a look at our map .
modified: Some days before we had decided to organize an excursion to a nature trail nearby as soon as we arrived at the railway stop , we were so fascinated by what surrounded us that we had been walking for three hours along a path , Suddenly , our surroundings appeared to be far wilder than it had been before so we stopped trekking and we had a look at our map .
transformation: PUNCT, PUNCT, NOUN, VERB:TENSE, PRON, PUNCT