Overview of text normalization

Lemmatize an English sentence with Spacy. Your output is a string of all lemmatized elements in the sentences. Do not ignore the punctuation marks.

For example, if you get such an input sentence:

There are two error measurements in stemming algorithms, overstemming and understemming

Then, then your output should be like this:

there be two error measurement in stem algorithm , overstemme and understemme