Complex sentence: The song debuted on the UK Singles Chart in February 1989 at number 81 and peaked at number one in April spending four weeks there and went on to spend twenty weeks in the chart and was the UK's third best-selling song of 1989.
Split into simpler sentences: The song debuted on the UK Singles Chart in February 1989 at number 81 and peaked at number one in April, spending four weeks there. It went on to spend twenty weeks in the chart and was the UK's third best-selling song of 1989.