sentence: It was the first day of Max 's school excursion to Patagonia . They had arrived there the night before , but today was the day they would actually go exploring .
modified: It was the first day of Max 's School excursion to the Patagonia , they had arrive there yesterrday night but , today was the day they would actually go exploring .
transformation: ORTH, DET, PUNCT, VERB:FORM, OTHER, PUNCT