> Who reassigned the species Brachiosaurus brancai to its own genus, and when?

> ChatGPT said:

> The species Brachiosaurus brancai was reassigned to its own genus, Giraffatitan brancai, by paleontologist George Olshevsky in 1991. This reclassification was later supported by a detailed study by Michael P. Taylor in 2009, which reinforced the distinction between Brachiosaurus and Giraffatitan based on anatomical differences.

My ChatGPT has just given a correct answer. What am I doing wrong?