Parsing Question

Hello, I have a text variable that stores an address like:
"1234 West Main Street, Denver, CO, 80211, USA"
However, sometimes I will get a multiple address back like 1234-1255 West Main Street, Denver, CO, 80211, USA"
What I would like to do is just grab the digits to the left of the dash only so it parses out the above to read:
"1234 West Main Street, Denver, CO, 80211, USA".
Help appreciated. Thanks.