it is "an" x property

[KennethKinLum]

goes by the sound, not the letters:

https://www.englishforums.com/English/ALettersPronouncedVowels/bpxkd/post.htm https://answers.yahoo.com/question/index?qid=20110315152436AAldr5h https://english.stackexchange.com/questions/8181/does-one-use-a-or-an-before-the-word-x-ray

[CLAassistant]

All committers have signed the CLA.