Complex sentence: She completed her banking qualifications by the age of 23, having been awarded a Chartered Institute of Bankers prize for Human Aspects of Management and was invited by her local college to teach banking subjects at evening school in her spare time.
Split into simpler sentences: She completed her banking qualifications by the age of 23, having been awarded a Chartered Institute of Bankers prize for Human Aspects of Management and was invited by. Her local colleddge to teaching banking subjects at evening school in her spare time.