def extract_arguments(fh):
    n = int(fh.readline().strip())
    nodes = []
    for _ in range(n):
        node_info = list(map(int, fh.readline().strip().split()))
        nodes.append(node_info)
    return n, nodes

#if __name__ == "__main__":
#    import sys
#    input_path = sys.argv[1]
#    with open(input_path, 'r') as fh:
#        n, nodes = extract_arguments(fh)
#    # Use the extracted arguments to call the process function
#    process_tree(n, nodes)


### Explanation:

#1. **Extract Arguments Function**:
#   - Reads the number of nodes `n`.
#   - Reads the `n` lines representing each node's information and stores it in a list of tuples.
