import re
FILE = 'bible.txt'
with open(FILE) as fil:
data = fil.read()
chapter = lambda x, num: list(filter(lambda y: y.strip(), re.split(r'={2,3} .+ ={2,3}', x)))[num]
sentence = lambda x, num: list(filter(lambda y: y.strip(), re.split(r'\n\d+\s', x)))[num]
word = lambda x, num: re.split(r'\s+', x)[num]
word(sentence(chapter(data, 3), 2), 1)
# 'несколько'