def list_filter(str_list):
    filtered = []
    is_end = False
    for string in str_list:
        words = string.split(' ')
        for i, word in enumerate(words):
            if i > 0:
                if word[0].isupper():
                    continue
                else:
                    is_end = True
                    break
            if word.isdigit():
                is_end = True
                break
            if len(words) == 1 and not word[0].isupper():
                is_end = True
                break
        if is_end:
            break
        else:
            filtered.append(string)
    return filtered