It wasn't until vs. not until ... did

Qual das duas frases abaixo soa/lhe parece melhor?

1. It wasn’t until the early 1800s that the word “celebrity” came to mean “a well-known or famous person,” according to the dictionary.

2. According to the dictionary, not until the early 1800s did the word “celebrity” come to mean “a well-known or famous person.”

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