Complex sentence: He received many Art prizes during his career, e.g. the "Sofia Prize" where he got the First Prize and was awarded with the Medal and Special Diploma and could organize a lot of exhibitions of his own works such as "Ancient and Contemporary Greece".
Split into simpler sentences: He received many Art prizes during his career, e.g. the "Sofia Prize" where he got the First Prize and was awarded with the Medal and Special Diploma. He could organize a lot of exhibitions of his own works such as "Ancient and Contemporary Greece".