I want to know the answer to the following question:
The first astrolabe with gear-wheels was invented when?
All the background I'm provided with is that "Abū Rayhān al-Bīrūnī invented the first mechanical geared lunisolar calendar astrolabe, an early fixed-wired knowledge processing machine with a gear train and gear-wheels, circa 1000 AD.". Is that enough to answer the question?