IndexError: list index out of range when compiling

file = open("csv_data.txt","r")
lines = file.readlines()
file.close()

lines=[line.strip() for line in lines[1:]]

for line in lines:
    person_data = line.split(",")
    name = person_data[0]
    age = person_data[1]
    university = person_data[2]
    degree = person_data[3]

    print(f'{name.title()} is {age}, studying {university.title()} at {degree.capitalize()}.')