Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Ex Input:
The majority of arthropods live on land.

Ex Output:
Where do the majority of arthropods live?


Ex Input:
Pressure and vibration are examples of physical type of stimuli.

Ex Output:
Pressure and vibration are examples of what type of stimuli?


Ex Input:
The oldest fossil of land plants date back 470 million years many millions of years.

Ex Output:

The oldest fossil of land plants date back how many millions of years?