Complex sentence: During the course of each level, the player will be attacked by groups (of about 2-5) of a particular enemy, taking out every enemy in a particular group, produces a token of either bronze, silver or gold.
Split into simpler sentences: During the course of each level, the player will be attacked by groups (of about 2-5) of a particular enemy. Taking out every enemy in a particular group produces a token of bronze, silver or gold.