per_children.rules

# His son, Joe
# (Stanford dependencies; conj is fixing common parse errors)
{ner:PERSON}=entity >/poss/ ( {lemma:/son|daughter|child/} >/appos|conj.*/ {ner:PERSON}=slot )
# (Universal dependencies; conj is fixing common parse errors)
{lemma:/son|daughter|child/} >/nmod:poss/ {ner:PERSON}=entity >/appos|conj.*/ {ner:PERSON}=slot
{ner:PERSON}=entity >/poss/ ( {lemma:/son|daughter|child/}  >/appos|conj.*/ {ner:PERSON}=slot )
# Among ENTITY's sons are SLOT.
{lemma:/be/} >/(prep_|nmod:|obl:).*/ ( {lemma:/son|daughter|child/} >/nmod:poss/ {ner:PERSON}=entity ) >/.subj/ {ner:PERSON}=slot
# SLOT, son of ENTITY
{ner:PERSON}=slot >/appos|conj.*/ ( {lemma:/son|daughter|child/} >/(prep_|nmod:|obl:)of/ {ner:PERSON}=entity )