Table 1.
Top 30 key words

Ranking	Frequency		TF-IDF-degree		Network-degree		Centrality
1	Ttukseom Hangang Park	6,589	Order	233	Ttukseom Hangang Park	517	Ttukseom Hangang Park	0.8
2	Hangang Park	4,687	Beer	233	Hangang Park	440	Hangang Park	0.7
3	Shade	2,479	Ambience	232	Photo	220	Photo	0.4
4	Photo	2,285	Rent	230	Shade	166	Shade	0.3
5	Friend	1,259	Family	222	Snow sled/skating rink	153	Snow sled/skating rink	0.2
6	Snow sled/skating rink	1,250	Laid back	221	Cafe	135	Cafe	0.2
7	Cafe	1,148	Date	215	Friend	114	Friend	0.2
8	Picnic	1,100	Coffee	212	Ramen	108	Ramen	0.2
9	Ramen	1,089	Visit	212	Famous restaurant	99	Famous restaurant	0.2
10	Bike	903	Famous restaurant	211	Experience	90	Experience	0.2
11	Rent	852	Street	209	Picnic	88	Picnic	0.2
12	Mat	758	Food	204	Bike	86	Bike	0.2
13	Chicken	747	Riverside	201	Chicken	81	Chicken	0.2
14	Parking lot	715	Parking lot	195	Coffee	80	Trip	0.2
15	Looper	646	Landscape	190	Looper	72	Mat	0.2
16	Children	642	Outing	190	Konkuk University	72	Rent	0.2
17	Jacaranda	627	Love	190	Trip	70	Order	0.2
18	Sky	580	Delivery	189	Mat	68	Stroll	0.2
19	Every day	573	Subway	186	Rent	65	Date	0.2
20	Famous restaurant	567	Table	184	Order	65	Coffee	0.1
21	Stroll	558	Story	184	Stroll	64	Looper	0.1
22	Experience	543	Nightscape	182	Children	63	Konkuk University	0.1
23	Date	535	Flower	175	Parking lot	61	Children	0.1
24	Trip	520	Reservation	172	Event	55	Parking lot	0.1
25	Sense	520	Healing	172	Date	54	Event	0.1
26	Delivery	513	Menu	156	Jacaranda	52	Jacaranda	0.1
27	Coffee	489	Memory	155	Marathon	52	Marathon	0.1
28	Konkuk University	463	Konkuk University	154	Trash	51	Trash	0.1
29	Couple	458	Free	153	Reservation	49	Reservation	0.1
30	Order	454	Sunset	152	Set	49	Set	0.1