Despite the death of Queen Mary on 24 March, the coronation on 2 June 1953 went ahead as planned, as Mary had asked before she died. The ceremony in Westminster Abbey, with the exception of the anointing and communion, was televised for the first time.[d] Elizabeth's coronation gown was embroidered on her instructions with the floral emblems of Commonwealth countries: English Tudor rose; Scots thistle; Welsh leek; Irish shamrock; Australian wattle; Canadian maple leaf; New Zealand silver fern; South African protea; lotus flowers for India and Ceylon; and Pakistan's wheat, cotton, and jute.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What floral emblem was highest on Elizabeth's coronation dress?
Ah, so.. unanswerable

One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights or lanterns (chromacity and luminance standards being set under the Convention on the International Regulations for Preventing Collisions at Sea 1972, Annex I and the CIE) and LED-based Christmas lights. In cold climates, LED traffic lights may remain snow-covered. Red or yellow LEDs are used in indicator and alphanumeric displays in environments where night vision must be retained: aircraft cockpits, submarine and ship bridges, astronomy observatories, and in the field, e.g. night time animal watching and military field use.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What type of light is ideal for traffic signals?
Ah, so.. One-color light

After the war, Operation Glory was conducted from July to November 1954, to allow combatant countries to exchange their dead. The remains of 4,167 U.S. Army and U.S. Marine Corps dead were exchanged for 13,528 KPA and PVA dead, and 546 civilians dead in UN prisoner-of-war camps were delivered to the South Korean government. After Operation Glory, 416 Korean War unknown soldiers were buried in the National Memorial Cemetery of the Pacific (The Punchbowl), on the island of Oahu, Hawaii. Defense Prisoner of War/Missing Personnel Office (DPMO) records indicate that the PRC and the DPRK transmitted 1,394 names, of which 858 were correct. From 4,167 containers of returned remains, forensic examination identified 4,219 individuals. Of these, 2,944 were identified as American, and all but 416 were identified by name. From 1996 to 2006, the DPRK recovered 220 remains near the Sino-Korean border.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many US service members were exchanged during this operation?
Ah, so..
4,167