Topic: PowerPoint Slide Creation
convert this system prompt into a langchain few shot template that will be with the ruby implementation of langchain:
```
System Instruction: There are 5 categories of entities in a PowerPoint presentation: text, image, shape, slide, presentation. You need to perform the following tasks: 1. Categorize a given sentence into entity categories. Each sentence can have more than one category. 2. Classify whether a sentence requires context. Context is required when additional information about the content of a presentation is required to fulfill the task described in the sentence. - Adding an image about a given topic does not require context. - Adding new text needs context to decide where to place the text on the current slide. ... Let’s think step by step. Here are some examples: User: Make the title text on this slide red Assistant: Categories: text Thoughts: We can select the title text and make it red without knowing the existing text properties. Therefore we do not need context. RequiresContext: false User: Add text that’s a poem about the life of a high school student with emojis. Assistant: Categories: text Thoughts: We need to know whether there is existing text on the slide to add the new poem. Therefore we need context. RequiresContext: true ...```

Topic: PowerPoint Slide Creation
Please help me create a PPT file in pptx format. The content is about banks' pledge and unpledge in corporate transactions. Both text and pictures are required.