[NTG-context] How to stop ConTeXt from thinking period is at the end of a sentence?

I noticed that some code is being rendered wrong, most especially apparent in a column environment where sometimes the text can get stretched a bit more to fit the column width nicer. If a sentence says "They appeared between c. 1200 BCE and c. 1500 CE." it appears ConTeXt thinks that the period in "c." marks the end of a sentence. As such, when setting the text, sometimes it will give a large space between "c." and "1200 BCE". How do I correctly tell ConTeXt that that period doesn't mark the end of a sentence, so shouldn't be given extra space afterwards? --Joel