Task: Table-QA (source dataset: FinQA)

Task: 
You are given a table containing structured data and a natural language question referring to the table. Your goal is to analyze the table and provide an accurate and concise answer based on the given data.

Instructions:
1. Understand the Table: Examine the structure, headers, and data in the table. Identify relevant columns and rows related to the question.
2. Interpret the Question: Determine whether the question requires direct retrieval, aggregation, comparison, sorting, filtering, or inference.
3. Extract the Answer: Use logical reasoning and numerical operations (if necessary) to derive the correct response from the table.
4. Format the Answer: No explanation, return the answer in a structured JSON format: {"answer": <answer>}. If the question cannot be answered due to missing or ambiguous data, return a JSON response with {"answer": null}.

Table:
| location            | function                                                                                                |   size ( square feet ) | property interest   |
|:--------------------|:--------------------------------------------------------------------------------------------------------|-----------------------:|:--------------------|
| boston ma           | corporate headquarters us tower division headquarters and american tower international headquarters     |                  19600 | leased              |
| southborough ma     | information technology data center                                                                      |                  13900 | leased              |
| woburn ma           | us tower division lease administration site leasing management and broadcast division headquarters      |                  57800 | owned ( 1 )         |
| atlanta ga          | us tower division accounting services headquarters                                                      |                  21400 | leased              |
| cary north carolina | us tower division new site development site operations and structural engineering services headquarters |                  17500 | leased              |
| mexico city mexico  | mexico headquarters                                                                                     |                  11000 | leased              |
| sao paulo brazil    | brazil headquarters                                                                                     |                   5200 | leased              |

Question:
what portion of the woburn property is used by the american tower corporation?


pre_text: item 2 .
properties our principal offices are located in boston , southborough and woburn , massachusetts ; atlanta , georgia ; cary , north carolina ; mexico city , mexico ; and sao paulo , brazil .
details of each of these offices are provided below: .
post_text: ( 1 ) the facility in woburn contains a total of 163000 square feet of space .
approximately 57100 square feet of space is occupied by our lease administration office and our broadcast division , and we lease the remaining space to unaffiliated tenants .
in addition to the principal offices set forth above , we maintain 15 regional area offices in the united states through which we operate our tower leasing and services businesses .
we believe that our owned and leased facilities are suitable and adequate to meet our anticipated needs .
we have also established an office in delhi , india to pursue business opportunities in india and southeast asia , and we have an international business development group based in london , england .
our interests in our communications sites are comprised of a variety of ownership interests , including leases created by long-term ground lease agreements , easements , licenses or rights-of-way granted by government entities .
pursuant to the loan agreement for the securitization , the tower sites subject to the securitization are subject to mortgages , deeds of trust and deeds to secure the loan .
a typical tower site consists of a compound enclosing the tower site , a tower structure , and one or more equipment shelters that house a variety of transmitting , receiving and switching equipment .
there are three principal types of towers : guyed , self- supporting lattice , and monopole .
2022 a guyed tower includes a series of cables attaching separate levels of the tower to anchor foundations in the ground .
a guyed tower can reach heights of up to 2000 feet .
a guyed tower site for a typical broadcast tower can consist of a tract of land of up to 20 acres .
2022 a lattice tower typically tapers from the bottom up and usually has three or four legs .
a lattice tower can reach heights of up to 1000 feet .
depending on the height of the tower , a lattice tower site for a wireless communications tower can consist of a tract of land of 10000 square feet for a rural site or less than 2500 square feet for a metropolitan site .
2022 a monopole is a tubular structure that is used primarily to address space constraints or aesthetic concerns .
monopoles typically have heights ranging from 50 to 200 feet .
a monopole tower site of the kind typically used in metropolitan areas for a wireless communications tower can consist of a tract of land of less than 2500 square feet. .
label: 0.3546
qa: answer: 35.5%
ann_table_rows: 3
ann_text_rows: 3
steps: op: divide1-1
arg1: 57800
arg2: 163000
res: 35.5%
program: divide(57800, 163000)
gold_inds: table_3: location the woburn ma of function is us tower division lease administration site leasing management and broadcast division headquarters ; the woburn ma of size ( square feet ) is 57800 ; the woburn ma of property interest is owned ( 1 ) ;
text_3: ( 1 ) the facility in woburn contains a total of 163000 square feet of space .
exe_ans: 0.3546
tfidftopn: text_20: a monopole tower site of the kind typically used in metropolitan areas for a wireless communications tower can consist of a tract of land of less than 2500 square feet. .
program_re: divide(57800, 163000)
model_input: text_1
properties our principal offices are located in boston , southborough and woburn , massachusetts ; atlanta , georgia ; cary , north carolina ; mexico city , mexico ; and sao paulo , brazil .
table_3
location the woburn ma of function is us tower division lease administration site leasing management and broadcast division headquarters ; the woburn ma of size ( square feet ) is 57800 ; the woburn ma of property interest is owned ( 1 ) ;
text_3
( 1 ) the facility in woburn contains a total of 163000 square feet of space .