You will be given a definition of a task first, then some input of the task.
This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.

Passage: In 2007, the Land Forces consisted of 29,600 soldiers (6th Guards Mechanised Brigade (Grodno), 11th Guards Mechanized Brigade at Slonim, the 120th Guards Mechanised Brigade (Minsk), 38th and 103rd Mobile Brigades (organized similarly to Soviet airborne regiments, not all of them are equipped with BMD-1), 5th Spetsnaz Brigade (Maryina Horka), five artillery brigades and four regiments, two MRL regiments, 15th, 29th, 115th, 120th and 302nd SAM Brigades, two SSM brigades, two brigades and one regiment of engineers, 8th independent NBC Brigade, two signals brigades, 40th independent NBC battalion. Army equipment includes 1800 main battle tanks (MBT) and 2600 AFV/APC. The weapons and equipment storage bases include the 50th (Brest), 19th, 34th Tank Division & 37th Guards Tank Division (former tank divisions), 3rd Guards Tank Division, and 28th (Baranovichi). Weapons storage bases that have been disbanded include the 29th, 30th, 193rd Tank Division, and the storage base that used to be the 8th Guards Tank Division at Marina Gorka.
Output:
How many SAM brigades were there?