Please correct the parallelism in this sentence:

In the parade the Boy Scouts Presented the Colors, There was a marching band, and the mayor rode in a convertible.

In the parade the Boy Scouts Presented the Colors, the marching band played, and the mayor rode in a convertible.

To correct the parallelism in the sentence, you can revise it as follows:

"In the parade, the Boy Scouts presented the Colors, there was a marching band, and the mayor rode in a convertible."

To correct the parallelism in the sentence, you should ensure that all the elements are structured in a consistent manner. Here's the revised sentence:

In the parade, the Boy Scouts presented the Colors, the marching band performed, and the mayor rode in a convertible.

In this revised sentence, all three elements are now structured in the same way, starting with a verb (presented, performed, and rode) to maintain parallelism.