Complex sentence: Grant was awarded a star in 1980 for his television work; in 2002, he received a second star in the "special" category to acknowledge his pivotal role in improving and popularizing the Walk.
Split into simpler sentences: Grant was awarded a star in 1980 for his television work. In 2002, he received a second star in the "special" category to acknowledge his pivotal role in improving and popularizing the Walk.