e.g. Will the government open open air areas if considered safe as Covid19 cases drop

A fisherman fishes fishes. (Actually, in Norwegian, this sentence has three equal words: En fisker fisker fisker.)

Als wir in Waren waren, waren Waren knapp knapp geworden.

German for: When we were in Waren (a town) there was a shortage in goods.

One 'knapp' to much in there, just a stupid typo, should have been: Als wir in Waren waren, waren Waren knapp geworden.

A couple of famous ones

James while John had had had had had had had had had had had a better effect on the teacher

Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo

https://en.wikipedia.org/wiki/Buffalo_buffalo_Buffalo_buffalo_buffalo_buffalo_Buffalo_buffalo

https://en.wikipedia.org/wiki/James_while_John_had_had_had_had_had_had_had_had_had_had_had_a_better_effect_on_the_teacher

That that is, is. (What 1968 movie starring Cliff Robertson and Claire Bloom did this appear in?)

We never refuse refuse! (trash collectors advertisement. The first is a verb, accent 2nd syllable and s sounds llike z. The second is a noun, accent 1st syllable, soft s.)

James, while John had had " had", had had " had had"; " had had" had had a better effect on the teacher.

Ninja'd

A can can hold food.  May may be a warm month.  Will will graduate next year.

To who it may concern the Chinese flu flu across the globe to send us all batty

coders code code

Will Will graduate next year?

Tiger Woods wood woods would be best used in the woods

Sounds dangerous, could take your eye out if an unlucky rebound(s)