Given the task definition and input, reply with output. Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

Why was Dev Patel from Lion nominated up for Supporting Actor rather than Best Actor at the 89th Academy Awards? Why is he not eligible for Best Actor, but only Supporting Actor? I'm not asking whether he should or shouldn't, but about his eligibility.
Why was Dev Patel nominated for Supporting Actor rather than Best Actor?