Title: Spectre (2015 film).
Question: Terrorist activity in what French city impacted Spectre's earnings?

Title: Glacier.
Question: What shape do glacial valleys have after being widened by glacation?

Title: Somalis.
Question: What led to an increase in the number of Somalis leaving the country?

Title: Incandescent light bulb.
Question:
What were the major advantages of the tantalum light filament?