Prompt
                                        
                                            Create a realistic portrait of Sir John Irving Bell, a middle-aged man with a dignified expression, wearing formal attire, including a suit and a tie, with a subtle background that suggests a connection to medicine or research, such as a faint image of a laboratory or a medical library; he should be depicted with a slight smile, conveying a sense of approachability and authority, in a style that is reminiscent of a formal photograph taken in a professional setting.