How to make a request in the database Django

class A(models.Model):
    name_A = models.CharField(max_length=200)

class B(models.Model):
    name_B = models.IntegerField()
    relate_a = models.ManyToManyField(A)

class C(models.Model):
    name_C = models.CharField(max_length=100)
    relate_b = models.ManyToManyField(A)

We have name_C from C and name_B from B. How to make a queryset that gets name_A from tables C and B, and compare them.

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