def __init__(self):
        self.size_joint_feature = None
We define a custom parser here because we need to get the link from
dataset/ETHPy150Open pystruct/pystruct/pystruct/models/base.py/StructuredModel.__init__--crossover with--dataset/ETHPy150Open fictivekin/openrecipes/scrapy_proj/openrecipes/spiders/onehundredonecookbooks_feedspider.py/OnehundredonecookbooksfeedSpider.parse