500
The answer to the riddle in this Sylvia Plath poem:
I'm a riddle in nine syllables./ An elephant, a ponderous house,/ A melon strolling on two tendrils./ O red fruit, ivory, fine timbers!/ This loaf's big with its yeasty rising./ Money's new-minted in this fat purse./ I'm a means, a stage, a cow in calf./ I've eaten a bag of green apples,/ Boarded the train there's no getting off.
What is a pregnant woman?