https://bountify.co/write-a-python-function-that-determines-whether-text-in-a-string-is-quoted

quotes.py

#!/usr/bin/env python
from __future__ import print_function

def find_ranges(text):
    s = 0
    q = pc = ''
    start = None
    ranges = []
    seps = " .,:;-\r\n"
    quotes = "'\""
    for i, c in enumerate(text + "\n"):
        if s == 0 and c in quotes and pc in seps:
            start = i
            s = 1
            q = c
        elif s == 1 and c==q:
            s = 2
        elif s == 2:
            if c in seps:
                ranges.append((start+1, i-1))
                start = None
                s = 0
            else:
                s = 1
        pc = c
    return ranges

def pos_in_ranges(ranges, pos):
    for start,end in ranges:
        if start<=pos<end: return True
    return False

if __name__ == '__main__':

    TESTCASES = (
        "The dog's bark was loud",
        "He was 6' tall",
        "There's something funny smelling in John's sisters' apartment.",
        'This sentence has a "quotation", if you can even "oops" call it that.',
        "John's sister said, \"The funny smell might be John's 'friend' Jake.\"",
        "John said, \"He told me that yesterday.\n\"But now I've forgotten.\n\"I asked him to tell me again.\"\nHello"
    )

    for text in TESTCASES:
        print(text)
        ranges = find_ranges(text)
        for i, c in enumerate(text):
            r = 'T' if pos_in_ranges(ranges, i) else 'F'
            e = c if c == "\n" else ''
            print(r, end=e)
        print("\n")

$ ./quotes.py 
The dog's bark was loud
FFFFFFFFFFFFFFFFFFFFFFF

He was 6' tall
FFFFFFFFFFFFFF

There's something funny smelling in John's sisters' apartment.
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

This sentence has a "quotation", if you can even "oops" call it that.
FFFFFFFFFFFFFFFFFFFFFTTTTTTTTTFFFFFFFFFFFFFFFFFFFFTTTTFFFFFFFFFFFFFFF

John's sister said, "The funny smell might be John's 'friend' Jake."
FFFFFFFFFFFFFFFFFFFFFTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTF

John said, "He told me that yesterday.
"But now I've forgotten.
"I asked him to tell me again."
Hello
FFFFFFFFFFFFTTTTTTTTTTTTTTTTTTTTTTTTTTT
TTTTTTTTTTTTTTTTTTTTTTTTT
TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTFF
FFFFF