Question: The HMAS "Platypus" was ordered to support which submarine that ended up getting lost at sea in 1914?
Sentence (from "HMAS Protector (ASR 241)"): During her military career, "Protector" supported the trials of the "Collins"-class submarine s, and was involved in a search for the shipwreck of the World War II cruiser HMAS "Sydney" .
Relevant evidence: No