/ 
    [A-Z]+               # WB
    \(\d+,\d+\)          # (1,2)
    \s*=\s*              # =
    (?:                  # start non-capturing group
       \d+\.\d+,         # a float followed by comma
       \s*(\d+\.\d+),?   # capture a float (followed by comma?)
    )                    # end-group
  /gx