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In page Apollo:

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Cassandra was a daughter of Hecuba and Priam. Apollo wished to court her. Cassandra promised to return his love on one condition – he should give her the power to see the future. Apollo fulfilled her wish, but she went back on her word and rejected him soon after. Angered that she broke her promise, Apollo cursed her that even though she would see the future, no one would ever believe her prophecies.[citation needed]