#male_sibling a sibling who is male
exclusion: female_sibling
supertype: kinsman sibling (pm)
subtype: blood_brother.male_sibling__bloodbrother__brother a male with the same parents as someone else; "my brother still lives with our parents"
subtype: big_brother__bigbrother an older brother
subtype: little_brother a younger brother; "my little brother just had his 50th birthday"
subtype: stepbrother__half-brother a son of your stepparent by a former marriage
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