Why is “Spotlight Web Content” using so much VRAM and CPU?

Why is “Spotlight Web Content” using so much (32.56 GB) virtual RAM and CPU (up to 122.41% apparently)? More interestingly, how can I prevent it from doing so?

I am running this MacBook Pro with 4GB RAM and OS X 10.10.2 Yosemite.

I found this in Acticvity Monitor when my Computer was close to not responding anymore and killing it solved that problem. It shows the process had quite a high number of errors, as well (27443815).