There were a lot of those songs at the time, like "Midnight Special", "Freight Train", "Rock Island Line", so this was the "One After 909"; she didn't get the 909, she got the one after it."
В то время было много подобных песен, как например, „Midnight Special“, „Freight Train“, „Rock Island Line“ — вот к ним и добавилась „One After 909“.