Complex sentence: The sports infrastructure includes a big basketball court, a large cricket/football field, badminton courts etc. In addition to this it also has a 1000 + capacity coliseum and a 150 + capacity open air amphitheatre for cultural events.
Split into simpler sentences: The sports infrastructure includes a basketball court, cricket/football field, badminton courts, and several other facilities. The school also has a 1000 + capacity coliseum and a 150 + capacity open-air amphitheatre for cultural events.