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:
| Pos. | Mark | Athlete | Venue | Date |
| --- | --- | --- | --- | --- |
| 1.0 | 2.43m(7ft11½in) | Javier Sotomayor ( CUB ) | Budapest | 4 March 1989 |
| 2.0 | 2.42m(7ft11¼in) | Carlo Thränhardt ( FRG ) | Berlin | 26 February 1988 |
| 3.0 | 2.41m(7ft10¾in) | Patrik Sjöberg ( SWE ) | Piraeus | 1 February 1987 |
| 4.0 | 2.40m(7ft10¼in) | Hollis Conway ( USA ) | Seville | 10 March 1991 |
| 4.0 | 2.40m(7ft10¼in) | Stefan Holm ( SWE ) | Madrid | 6 March 2005 |
| 4.0 | 2.40m(7ft10¼in) | Ivan Ukhov ( RUS ) | Athens | 25 February 2009 |
| 7.0 | 2.39m(7ft10in) | Dietmar Mögenburg ( FRG ) | Cologne | 24 February 1985 |
| 7.0 | 2.39m(7ft10in) | Ralf Sonn ( GER ) | Berlin | 1 March 1991 |
| 9.0 | 2.38m(7ft9½in) | Igor Paklin ( USSR ) | Indianapolis | 7 March 1987 |
| 9.0 | 2.38m(7ft9½in) | Hennadiy Avdyeyenko ( USSR ) | Indianapolis | 7 March 1987 |
| 9.0 | 2.38m(7ft9½in) | Steve Smith ( GBR ) | Wuppertal | 4 February 1994 |
| 9.0 | 2.38m(7ft9½in) | Wolf-Hendrik Beyer ( GER ) | Weinheim | 18 March 1994 |
| 9.0 | 2.38m(7ft9½in) | Sorin Matei ( ROM ) | Wuppertal | 3 February 1995 |
| 9.0 | 2.38m(7ft9½in) | Matt Hemingway ( USA ) | Atlanta | 4 March 2000 |
| 9.0 | 2.38m(7ft9½in) | Yaroslav Rybakov ( RUS ) | Stockholm | 15 February 2005 |
| 9.0 | 2.38m(7ft9½in) | Linus Thörnblad ( SWE ) | Gothenburg | 25 February 2007 |
Question:
On which date was the position less than 4 at Piraeus?
Answer:
1 February 1987