1. Introduction  
2. Tasks and Datasets  
2.1 Image Captions  
2.2 Transcriptions  
2.3 Visual Interaction  
2.4 Sentiment/Emotion Recognition  
2.5 Comparison  
2.6 Miscellaneous Datasets  
3. Techniques  
3.1 Modular  
3.2 Embedding Projections  
3.3 Pivoting  
4. Roadmap  
4.1 General Trends  
4.2 Challenges and Directions