Title: Qing dynasty.
Question: Who besides the Manchus and the Han made up the Eight Banners?

Title: Spectre (2015 film).
Question: Who does M fight with?

Title: Avicenna.
Question: Who did Ibn Sina turn down in order to travel westwards after the Samanid dynasty ended?

Title: USB.
Question:
What is a downfall of the Battery Charging Specification?