Assertion: melon's seed | /r/HasProperty | produced
Facets:
value: by crossing a normal watermelon
type: MANNER
Source sentences:
text: The seeds for growing them are produced by crossing a normal diploid watermelon with one that has been changed genetically into the tetraploid state.
text: Seedless varieties are sterile hybrids, and the seeds are produced by crossing a normal watermelon and one that was genetically changed through chemical treatment at the seedling stage.