<｜begin▁of▁sentence｜>### Instruction:
Given a list of merges in tuple format and names for each item involved in the merges, how can you create and visualize a dendrogram using igraph, and print a summary of it?
### Response:
```python
import igraph as ig

# Create a dendrogram using a hypothetical list of merges
merges = [(0, 1), (2, 3), (1, 2)]  # Hypothetical merge history

# Create the dendrogram
dendrogram = ig.Dendrogram(merges, names=['A', 'B', 'C', 'D'])

# Print a summary of the dendrogram
print(dendrogram.summary(verbosity=1))

# Plot the dendrogram
ig.plot(dendrogram, orientation='left-right')
```
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