def commonFourGram(field):
    return set(ngrams(field.replace(' ', ''), 4))
Gets the number of contained components. Consistent with
dataset/ETHPy150Open datamade/dedupe/dedupe/predicates.py/commonFourGram--crossover with--dataset/ETHPy150Open rwl/muntjac/muntjac/ui/abstract_ordered_layout.py/AbstractOrderedLayout.getComponentCount