Complex sentence: In 1979 she graduated with a Bachelor of Fine Arts and by the year 1981 she had begun to work on her post graduate study, which included her thesis on "An Investigation into Benin Cire Perdue Casting Technique".
Split into simpler sentences: In 1979 she graduated with a Bachelor of Fine Arts. By the year 1981 she had decided to work on her post graduate study, which included her thesis on "An Investigation into Benin Cire Perdue Casting Technique".