I have two years left for my school to end.
I have four apples at home. My school sucks but it is the second best school in town.

I have three years left for my school to end.
I have four apples at home. My school sucks but it is the second best school in town.

txt = 'I have two years left for my school to end.
I have four apples at home. My school sucks but it is the second best school in town. I have three years left for my school to end.
I have four apples at home. My school sucks but it is the second best school in town.'
words = 'school'.split(' ')
sentences = re.findall(r"([^.]*.)" ,txt)
for sentence in sentences:
    if any(word in sentence for word in words):
        print(sentence.split('n'))

two
three