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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 get_task_output_description(task_output):
    '''
    Returns a task's output as a string
    '''
    output_description = "n/a"

    if isinstance(task_output, RemoteTarget):
        output_description = "[SSH] {0}:{1}".format(task_output._fs.remote_context.host, task_output.path)
    elif isinstance(task_output, S3Target):
        output_description = "[S3] {0}".format(task_output.path)
    elif isinstance(task_output, FileSystemTarget):
        output_description = "[FileSystem] {0}".format(task_output.path)
    elif isinstance(task_output, PostgresTarget):
        output_description = "[DB] {0}:{1}".format(task_output.host, task_output.table)
    else:
        output_description = "to be determined"

    return output_description