Filter examples

Hi all, at the moment i have an attribute called taxband which is made up of 1639 rows  and in one of the rows instead of having a numeric vale it says AMV:500,000 which im trying to remove. The process im using is filter example with condition class set to attribute value filter and parameter string =AMV:500,000. When i run the process i get an error reading saying that it cant invoke condition parameter string must have the form attrabute {=|<|>|<=}vale. I have played around with it but no success .
I did remove another another row which said price on application using the same process and the parameter string =price on application.Confused  ???