About: http://webisa.webdatacommons.org/151757869

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In your case, the if condition i.e. if[ -a ${aa} ] is executing as true, thus else or elif condition is not executing.
http://www.w3.org/ns/prov#wasQuotedFrom	linuxquestions.org