python - Extract Pattern in Pandas Dataframe -

i extracting pattern column of dataframe. has word 'oscar' , has word 'oscars'. how extract in panda dataframe . below extract line code. gives error.

 df['oscar_awards_won']  = df['awards'].str.extract('won  (\d+) (oscar[s]?)', expand=true).fillna(0) 

i sorry not posting sample data.sample data column awards. trying extract no of oscars won.

awards won 3 oscars. 234 wins & 312 nominations. won 7 oscars. 215 wins & 169 nominations. won 11 oscars. 174 wins & 113 nominations. won 4 oscars. 122 wins & 213 nominations. won 3 oscars. 92 wins & 150 nominations. won 1 oscar. 91 wins & 95 nominations. 

is needed?

import pandas pd df = pd.dataframe({'a': [1,2,3,4], 'b': ['is oscar','asd','oscars','not oscars q']})  df['c'] = ['won 3 oscars. 234 wins & 312 nominations.', 'won 7 oscars. 215 wins & 169 nominations.', 'won 11 oscar. 174 wins & 113 nominations.', 'won 4 oscars. 122 wins & 213 nominations.'] 

this line:

df['c'].str.extract('won (\d+) oscar[s]?', expand=true).fillna(0) 

gives:

    0 0   3 1   7 2  11 3   4