from nltk.tokenize import sent_tokenize

text = '''
Joe waited for the train. The train was late. 
Mary and Samantha took the bus. 
I looked for Mary and Samantha at the bus station.
'''
print("\nOriginal string:")
print(text)

token_text = sent_tokenize(text)
print("\nSentence-tokenized copy in a list:")
print(token_text)
print("\nRead the list:")
for s in token_text:
    print(s)