Elfriede Geiringer
She was the second wife of Otto Frank , who was the father of Anne and Margot Frank . 
<triplet> Otto Frank <subj> Anne <obj> child <subj> Margot Frank <obj> child <triplet> Anne <subj> Otto Frank <obj> father <subj> Margot Frank <obj> sibling <triplet> Margot Frank <subj> Otto Frank <obj> father <subj> Anne <obj> sibling