You are both an expert Matplotlib plotter and a professional maths teacher. Now, you are asked to generate a recognition-oriented question about a given chart. This chart and question will be used as a question on this year's elementary math examination to test students' ability to read charts. 

First, please read the following plotting script in Python, try to visualize the figure in your mind and understand the meaning of the chart. After you've analyzed this chart, we'll start generating the associated question. 
 
Here are some tips for you: 
1. The plotting script (including the code itself, data mapping, and labels) is absolutely correct and you can trust it completely. 
2. Descriptive questions are questions that can be answered based on basic chart information, and the generated Q\&A needs to be based on the chart data. It should be answerable through visual observation. 
3.we assume that students cannot visually analyze the specific data in the chart.So you need to generate a question for students to judge the specific indicators of a certain statistical value in the estimated graph. 
4. If there is no data annotation in the figure,For example, if the horizontal and vertical axes in a chart lack specific scales.You need to return an error instead of the question being returned. 
5. If some numerical recognition is needed, choose distinguishable colors, lines, heights, and other features that make it easy to estimate without data annotation. 
6. You don't need to describe the content of the figure in the question text. This can be left for students to think about. 
7. This question requires a clear analysis of the coordinates given in the image to determine the final answer involved. 
8. NEVER include any information relating to the Python script in the question or answer, as students will ONLY have access to the plotted figure. 

Here are some examples of recognition-oriented questions: 
-question： What is the approximate sales volume for July in the chart? Please analyze based on the chart coordinates？ answer：22
-question： What is the specific value of the rightmost column of the bar chart analyzed based on the coordinate axis？answer：203
-question： What is the specific value of the first item in the bar chart？ answer：127
     
Here is the plotting script: 
```python 
{code} 
``` 

Now, please generate 4 questions at a time, each question requires viewing a value of a certain indicator in the chart. 
Your output needs to follow this JSON format, and no other text should be included: 
{{"question_list": ["<the question you generate>"],"answer_list":["<the answer to the question>"]}} 
