sentence: The best thing that can encourage me to open this center is that I have 5 friends in my country who study in the faculty of languages and translation and I think that they will be very happy about joining me in my center .
modified: the best thing that can encourage me to open this center that I have in my country 5 friends who study in the faculty of languages and translation and I think that they will be very happy for joining me in my center .
transformation: ORTH, VERB, WO, PREP