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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def process_set(line, annotations):
 """Convert annotations into nanopub_bel annotations format"""


    matches = re.match('SET\s+(\w+)\s*=\s*"?(.*?)"?\s*$', line)

    key = None
    if matches:
        key = matches.group(1)
        val = matches.group(2)

    if key == "STATEMENT_GROUP":
        annotations["statement_group"] = val
    elif key == "Citation":
        annotations["citation"] = process_citation(val)
    elif key.lower() == "support" or key.lower() == "evidence":
        annotations["evidence"] = val
    elif re.match("\s*{.*?}", val):
        vals = convert_csv_str_to_list(val)
        annotations[key] = vals
    else:
        annotations[key] = val

    return annotations