Dates like "1700s" and "1980s" are replaced with the current date

[D. Bohdan]

I was really confused for a moment the first time I encountered this. :-)

To reproduce:

1. Run the Larynx server via the latest Docker container.
2. Open the web interface. Paste a phrase like "It was popular in the distant past of the 1700s." and press "Speak".

It.was.popular.in.the.distant.past.of.the.1700s.mp4