human
Explain in a sentence the following: "To fight the issues discussed above, different architectural modifications have been proposed to improve RNNs, the most popular being Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GTU).

The main idea behind LSTM, roughly speaking, is to have a cell state — a memory storage — inside every unit in addition to the hidden state (they are both vectors of the same size).

Also, these models have three gates (forget gate, input gate, output gate) that determine which info to write, read, or erase from the cell state."
gpt
--- Reasoning ---
1. Is the question multiple-choice question?
No
2. Is it implied multiple-choice question?
No
3. If two experts were independently asked the question, will the final answer be exactly the same?
No

--- Answer ---
open