After Agamemnon sends a message to Clytemnestra informing her of Iphigenia 's supposed marriage , he immediately regrets his decision and tries to send another letter telling them not to come .
Head entity: clytemnestra Q131157 6
Tail entity: iphigenia Q192673 10
Relation (head \u2192 tail): P25
Inverse relation (tail \u2192 head): P40