Problem with oil dipstick

I have a 2000 nissan sentra, mileage 110,000. When trying to check the oil, the dipstick broke off in the chamber. I have tried to put something down into the hole to get a grip on what's left of it, but it was pushed down instead of coming up.

Any idea the best way to remove this? When changing the oil, I thought I might be able to reach it after taking the oil filter off, but that wasn't possible either.

Thanks so much!