Table 2 The predefined 37 Base DSs with predicate and optional arguments

1

System service consulting

20

Query for info (premium)

2

Query for restaurant (type)

21

Query for info (name; premium)

3

Query for restaurant (food)

22

Query for info (service)

4

Query for restaurant (type; evaluation)

23

Query for info (name; service)

5

Query for restaurant (food; evaluation)

24

Query for info (address)

6

Query for restaurant (address)

25

Query for info (name; address)

7

Query for restaurant (address; type)

26

Query for info (type)

8

Query for restaurant (address; food)

27

Query for info (name; type)

9

Query for restaurant (address; business hour)

28

Query for info (food)

10

Query for restaurant (address; service)

29

Query for info (name; food)

11

Query for restaurant (address; premium)

30

Query for info (price)

12

Query for restaurant (business hour)

31

Query for info (food; price)

13

Query for restaurant(service)

32

Query for info (name; food; price)

14

Query for restaurant (premium)

33

Appreciate

15

Query for info (name)

34

Good-bye

16

Query for info (phone)

35

Greeting

17

Query for info (name; phone)

36

Yes

18

Query for info (business hour)

37

No

19

Query for info (name; business hour)