Choose the better summary of the given context from the given two summaries.
Context: Several icecaps on the Greenland ice sheet have started to melt rapidly.

Summaries:
a. The Greenland ice sheet has lost numerous icecaps over time.
b. Greenland's icecaps are quickly melting away.
The better summary is summary b- Greenland's icecaps are quickly melting away.
Complete the following task based on the instruction and optional input provided.### Instruction:
Choose the better summary of the given context from the given two summaries.

### Input:
Context: Several icecaps on the Greenland ice sheet have started to melt rapidly.

Summaries:
a. The Greenland ice sheet has lost numerous icecaps over time.
b. Greenland's icecaps are quickly melting away.

### Output:
The better summary is summary b- Greenland's icecaps are quickly melting away.