Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Township | FIPS | Population | Population\ndensity\n/km² (/sq mi) | Land area\nkm² (sq mi) | Water area\nkm² (sq mi) | Water % | Geographic coordinates |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Alta | 01500 | 221 | 2 (6) | 93 (36) | 0 (0) | 0.48% | 38°7′27″N 97°38′44″W﻿ / ﻿38.12417°N 97.64556°W |
| Burrton | 09600 | 1,143 | 12 (32) | 93 (36) | 0 (0) | 0.17% | 38°1′32″N 97°39′55″W﻿ / ﻿38.02556°N 97.66528°W |
| Darlington | 17025 | 601 | 7 (17) | 92 (35) | 0 (0) | 0.10% | 37°57′5″N 97°19′32″W﻿ / ﻿37.95139°N 97.32556°W |
| Emma | 21025 | 4,181 | 45 (116) | 93 (36) | 0 (0) | 0% | 38°8′10″N 97°25′46″W﻿ / ﻿38.13611°N 97.42944°W |
| Garden | 25300 | 294 | 3 (8) | 93 (36) | 0 (0) | 0% | 38°7′44″N 97°32′14″W﻿ / ﻿38.12889°N 97.53722°W |
| Halstead | 29625 | 353 | 4 (10) | 92 (35) | 0 (0) | 0.07% | 38°2′9″N 97°31′51″W﻿ / ﻿38.03583°N 97.53083°W |
| Highland | 31875 | 415 | 5 (12) | 92 (35) | 0 (0) | 0.19% | 38°7′38″N 97°19′9″W﻿ / ﻿38.12722°N 97.31917°W |
| Lake | 37825 | 173 | 2 (5) | 92 (36) | 1 (0) | 1.05% | 37°57′46″N 97°39′7″W﻿ / ﻿37.96278°N 97.65194°W |
| Lakin | 38150 | 357 | 4 (10) | 92 (35) | 0 (0) | 0.06% | 37°57′18″N 97°32′20″W﻿ / ﻿37.95500°N 97.53889°W |
| Macon | 43925 | 1,056 | 11 (30) | 92 (36) | 0 (0) | 0% | 38°2′8″N 97°24′58″W﻿ / ﻿38.03556°N 97.41611°W |
| Newton | 50500 | 1,950 | 28 (73) | 69 (27) | 0 (0) | 0.07% | 38°3′27″N 97°19′31″W﻿ / ﻿38.05750°N 97.32528°W |
| Pleasant | 56250 | 439 | 5 (12) | 93 (36) | 1 (0) | 0.81% | 38°2′27″N 97°12′8″W﻿ / ﻿38.04083°N 97.20222°W |
| Richland | 59350 | 360 | 4 (10) | 94 (36) | 0 (0) | 0.20% | 37°57′39″N 97°12′1″W﻿ / ﻿37.96083°N 97.20028°W |
| Sedgwick | 63825 | 1,711 | 18 (48) | 93 (36) | 0 (0) | 0% | 37°56′24″N 97°25′22″W﻿ / ﻿37.94000°N 97.42278°W |
| Walton | 75225 | 552 | 6 (15) | 95 (37) | 0 (0) | 0.06% | 38°7′26″N 97°13′1″W﻿ / ﻿38.12389°N 97.21694°W |
Question:
what township has the lowest population?
Answer:
Lake