
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A company produced 19,500 bags of cement from three different production lines: A, B, and C. To check the quality of this batch of cement, it was decided to use stratified sampling for testing. It is known that the number of samples taken from production lines A, B, and C form an arithmetic sequence. Then, the number of bags of cement produced by production line B is __________.

Present the answer in LaTex format: \boxed{Your answer}
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