In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Let me give you an example: Passage: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lo during July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
. Link Information: Operation Market Garden was a failed World War II military operation fought in the Netherlands from 17 to 25 September 1944. Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin?
The answer to this example can be: from 17 to 25 September 1944
Here is why: The passage describes the 704th's actions during Operation Market Garden, and the answer specifies when the operation happened.

OK. solve this:
Passage: A Military Shield detachment was present at the Palmyra frontline in December 2016, when ISIL launched a large-scale offensive in the area. This unit was later accused by the Tiger Forces to have fled in disarray after the first serious Islamist attacks, leaving Palmyra and Tadmor's remaining pro-government defenders to their fate. Soon after, Palmyra fell to ISIL, and the Military Security Shield Forces were among the pro-government units that sent reinforcements to help defend the nearby Tiyas Military Airbase from the next Islamist attack. The unit was also involved in the following government counter-offensive in the area. On 23 February 2017, al-Masdar News reported that over 900 Syrian Marines had joined the Military Security Shield Forces in order to avoid being drafted into the regular army. In June 2017, the Military Shield Forces took part in an anti-ISIL offensive in eastern Hama. Later that year, the militia took part in the battle to retake all of Deir ez-Zor city from ISIL. Afterwards, Military Shield militiamen began to garrison towns in eastern Syria which had been retaken from ISIL, such as Mayadin. The pro-opposition Syrian Observatory for Human Rights accused the militia of requisitioning food from local civilians during this time.
Link Information: The Tiyas Military Airbase, also known as the T-4 Airbase is a Syrian Arab Air Force (SyAAF) base located in the Homs Governorate, north of Tiyas, and west of the ancient city of Palmyra, Syria. Question: Where is the Tiyas Military Airbase?
Answer:
Answer: Syria