<human>: Question: As of 2000, how many people lived in the Plano Piloto?
Answer: The main purpose of the metro is to serve cities, such as Samambaia, Taguatinga and Ceilândia, as well as Guará and Águas Claras.
 Is the question answered in a satisfactory fashion?

OPTIONS:
- yes
- no
<bot>: no