Sorting data by specific variables using argparse

[Bearinabox]

I've been playing around with it, and I got it to work for the most part, except there's a problem. I can filter data by EITHER country or year, but not both. If I hash out one variable, it works, but I can't figure out how to combine it:

country = []
while True:
    value = str(input('To filter data, enter a country, type "done" when done: '))
    if value == 'done' :
        break
    try:
        value = str(value)
    except:
        print('Invalid input:')
        continue
    try:
        country.append(str(value))
    except:
        country.append(value)

print('you have entered: ',country)
print(type(country))

year = []
while True:
    value = input('Enter a year, type "done" when done: ')
    if value == 'done' :
        break
    try:
        value = int(value)
    except:
        print('Invalid input:')
        continue
    try:
        year.append(int(value))
    except:
        year.append(str(value))
print('you have entered:\n',year)


# filter out rows without year & country
olympics = name_country_year_event[name_country_year_event['Team'].isin(country) | name_country_year_event['Year'].isin(year)]

# print csv
print(olympics)

Any ideas?
Thanks!