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:
| Constituency | Winner | Party | Margin | Runner-up a | Party a |
| --- | --- | --- | --- | --- | --- |
| Madras North | D. Pandian | INC | 113771.0 | N. V. N. Somu | DMK |
| Madras Central | Era. Anbarasu | INC | 66406.0 | A. Kalanidhi | DMK |
| Madras South | Vyjayanthimala | INC | 125844.0 | Aladi Aruna | DMK |
| Sriperumbudur | Maragatham Chandrasekar | INC | 154551.0 | K. Ganesan | DMK |
| Chengalpattu | Kanchi Panneerselvam | ADMK | 122867.0 | M. V. Ramu | DMK |
| Arakkonam | R. Jeevarathinam | INC | 62393.0 | K. Murthy | DMK |
| Vellore | A. K. A. Abdul Samad | INC | 160850.0 | M.Abdul Lathief | DMK |
| Tiruppattur | A. Jayamohan | INC | 134833.0 | K. C. Alagiri | DMK |
| Vandavasi | L. Balaraman | INC | 100172.0 | D. Venugopal | DMK |
| Tindivanam | R. Ramadoss | INC | 100715.0 | N. Dayanidhi | DMK |
| Cuddalore | P. R. S. Venkatesan | INC | 116835.0 | G. Bhaskaran | DMK |
| Chidambaram | P. Vallalperuman | INC | 28283.0 | A. Ayyasamy | DMK |
| Dharmapuri | M. G. Sekhar | ADMK | 113020.0 | B. D. Elangovan | PMK |
| Krishnagiri | K. Ramamurthy | INC | 201494.0 | B. Venkataswamy | JD |
| Rasipuram | B. Devarajan | INC | 251975.0 | R. Mayavan | DMK |
| Salem | Rangarajan Kumaramangalam | INC | 241770.0 | M. Karthikeyan | DMK |
| Tiruchengode | K. C. Palanisamy | ADMK | 272271.0 | C. Poongothai | DMK |
| Nilgiris | R. Prabhu | INC | 173771.0 | S. A. Mahalingam | DMK |
| Gobichettipalayam | P. G. Narayanan | ADMK | 225957.0 | N. K. K. Periasamy | DMK |
| Coimbatore | C. K. Kuppuswamy | INC | 140068.0 | R. Umanath | CPM |
| Pollachi | B. Raja Ravi Varma | ADMK | 231309.0 | M. Arumugham | CPI |
| Palani | A. Senapathi Gounder | INC | 80913.0 | Rajkumar Mandradiar | DMK |
| Dindigul | C. Srinivasan | ADMK | 235368.0 | N. Varatharajan | CPM |
| Madurai | A. G. S. Ram Babu | INC | 213778.0 | V. Velusamy | DMK |
| Periyakulam | R. Muthiah | ADMK | 221404.0 | Cumbum A. K. Mahendiran | DMK |
| Karur | M. Thambi Thurai | ADMK | 238751.0 | K. C. Palanisamy | DMK |
| Tiruchirappalli | L. Adaikalaraj | INC | 169966.0 | T. Rangarajan | CPM |
| Perambalur | A. Asokaraj | ADMK | 136176.0 | S. Panovaikaruthazhvan | DMK |
| Mayiladuthurai | E. S. M. Pakeer Mohammad | INC | 101945.0 | P. Kalyanam | DMK |
| Nagapattinam | M. Selvarasu | CPI | 21523.0 | N. S. Veeramurasu | INC |
| Thanjavur | S. Singaravadivel | INC | 97147.0 | S. Palnimanickam | DMK |
| Pudukkottai | N. Sundararaj | INC | 271136.0 | A. Selvaraj | DMK |
| Sivaganga | P. Chidambaram | INC | 219552.0 | A. Ganesan | DMK |
| Ramanathapuram | V. Rajeshwaran | INC | 179544.0 | S. P. Thangavelan | DMK |
| Sivakasi | K. Kalimuthu | ADMK | 137068.0 | V. Gopalsamy | DMK |
| Tirunelveli | M. R. Janardhanan | ADMK | 191135.0 | D. S. A. Sivaprakasam | DMK |
| Tenkasi | M. Arunachalam | INC | 172707.0 | R. Krishnan | CPM |
| Tiruchendur | R. Dhanushkodi Adithan | INC | 212071.0 | A. Karthikeyan | DMK |
Question:
How many winners have a runner-up of A. Karthikeyan?
Answer:
1.0