category subject message 16150 politics,National Crime Survey,"Well, I droppe... NaN NaN 256 politics,Re: Europe vs. Muslim Bosnians,"I lik... NaN NaN 8355 recreational,Re: wife wants convertible,": : ... NaN NaN 9609 religion,"Re: After 2000 years, can we say tha... NaN NaN 8288 recreational,Re Aftermarket A/C units,"| I loo... NaN NaN 1b) Remove null observations Given that we are carrying out a classification/prediction task, we're going to drop null values from the dataframe. Drop any rows containing null values in any of the three columns of news_df . Store this back into news_df . I # YOUR CODE HERE I assert news_df.isna().sum().sum() assert news_df.shape == (18731, 3) == 0

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