Simplify the following text for a Grade 5 native English-speaking person.
Original: and though `` MotÃ rhead was n't punk rock ... they were the first metal band to harness that energy and , in the process , they created speed metal and thrash metal . ''
Simplified: Many listeners call them the first speed metal or thrash metal band . MotÃ rhead are a main influence on other bands that play those styles .