Just some comments on what I have learned about Fact Types:
My database was ported from a different program. For my custom Fact Types, such as Eye Color, the detail moved to the Fact Note, rather than the Fact Description. That makes it look funny in a narrative report (no identifying text, or a period in a strange place). So, I have had to manually retype the data into the Description and delete the text in the Note. (There does not seem to be a way to just delete a note.)
I also found the sentence had a field [Fact type], but there is no such field. So, I manually changed that to hard-coded "Eye Color. [desc].". I am not smart enough to make it say "He/She has/had brown eyes."