system
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human
Identify the coherence issues in the following text and suggest improvements.

Input:
John went to the store to buy some groceries. He wanted to make a salad for lunch. Tomatoes, cucumbers, and lettuce were on his list. He found everything he needed quickly. After he paid for his groceries he drove back home.
gpt
The text lacks coherence because it jumps abruptly from the store to John's drive back home. To improve coherence, a new sentence could be added between sentences three and four: "While at the store, John quickly found everything that he needed for his salad, including tomatoes, cucumbers, and lettuce."