/html/body/aaa/bbb/ccc/*[2]
Select element at position [n] at some level/html/body/aaa/bbb/ccc/*[2]
<html> <head> </head> <body> <aaa> <bbb> <ccc> <ddd></ddd> <eee>this</eee> <fff></fff> </ccc> </bbb> </aaa> </body> </html>