I'm playing the Infocom text adventure Deadline.  I played it decades ago as a kid, but I'm struggling with figuring out the words and phrases the game's parser can understand.
For example, I found one of the NPC's called Ms. Dunbar.  I entered "talk to ms. dunbar" and the game responded "ms. dunbar is listening".  I wanted to ask Ms. Dunbar about her recollection of the events that occurred on the morning of the murder.  I wanted to see how well it aligned with the previous answers she'd given the police.
So, I tried variations of the following:
- ms. dunbar, what happened the morning of the murder
 - ms. dunbar, tell me about the morning of the murder
 - ms. dunbar, describe the morning of the murder
 - ms. dunbar, what did you do the morning of the murder
 
The parser didn't understand "what", "happened", "about", "morning", etc. etc.
I've experimented with various inputs that are imperative statements like "give X to Y", and I've been successful with this type of input.  But I can't figure out how to question suspects.
So, my question is:  How do I interrogate the various suspects in the game since the parser seems to only understand imperative sentences?
Thanks,
Craig