There doesn't seem to be an obvious precedent or explanation for that.

The cool, angular nature of the facade has an obvious modern precedent.

This expo was the most obvious precedent for the many international exhibitions, later called world's fairs, that have continued to be held to the present time.

The music had no obvious precedents, and it generated its power percussively, with dense tangles of sound.

"Friends" did not have an obvious precedent when it made its debut in 1994; neither did "Roseanne."

As an ending for a historical opera, Maria's sweetly chilling idiot song has an obvious precedent in a composer Tchaikovsky affected to despise.

It is a subject that repays examination by someone with a historian's eye, for there are obvious precedents - the Spanish-American War of 1898, for example.

There is no obvious precedent for a tablet or smartphone OS going open source and succeeding in the marketplace.

There are no obvious precedents for Ms. Campion's cinema.

The squandered victory in Afghanistan was an obvious precedent.