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There are several ways to accomplish this depending on the information you have. Here's one possible solution:

1. Create a regular expression pattern to match the product weight value. Assuming the format is like "Product Weight: xxx lbs", you can use the pattern `r'Product Weight: (d+)'`.
2. Iterate through the text or data where the product weight is mentioned.
3. Apply the regular expression pattern to each line or instance of the text.
4. If a match is found, extract and store the value (e.g., using `re.search()` and `group(1)` to retrieve the weight).
5. Repeat the process until all relevant lines or instances have been checked.

Here's an example code snippet in Python:

“`python
import re

text = """
Product Title: Item A
Product Weight: 5 lbs
Product Description: This is a description of item A.

Product Title: Item B
Product Weight: 10 lbs
Product Description: This is a description of item B.
"""

pattern = re.compile(r'Product Weight: (d+)')

product_weights = []

for line in text.splitlines():
match = pattern.search(line)
if match:
weight = match.group(1)
product_weights.append(weight)

print(product_weights)
“`

Output:
“`
['5', '10']
“`

In this example, the program extracts the product weight values from the given text and stores them in the `product_weights` list. The final output only displays the weight values without the title.